Dimitri
Mendeleev created this, the original, periodic table, 1869 : it is been
modified in 1994 :
rf-unq
db-unp sg-unh (106) bh-ns hs (108) mt (109) uun
(110) uuu (111) 1996 (112)
Glossary
of
Archaic Chemical Terms
Introduction
and Part I (A-L)
Last
modified 12/15/98.
This
glossary makes no claims for completeness or originality. I compiled the
following list
mainly
of terms I came across in the course of reading and posting the papers listed in
the
classic
papers section of this site. I intended it mainly for my own use or as a
teaching tool.
As a
result, it lacks the polish and the painstaking acknowledgement of sources of a
scholarly
work. I
hope it is, nonetheless, useful. It will continue to grow as I add more papers
and
better
cross-reference the ones I have already posted.
I have
tried to cross-reference entries. Terms in parentheses () are usually linked
cross-references
within the glossary. Names in brackets [] are scientists in whose work the
term
appears (perhaps in translation), not necessarily (and usually not) those who
coined the
term.
Many of these names have links to papers posted at this site. Use your browser's
search
function to find the glossed term in such a paper. The notation et al. means
that there
are
additional papers at this site that contain the term.
Finally
a partial list of sources follows:
James Bryant Conant, ed., Harvard Case Histories in Experimental Science,
vol. 1
(Cambridge, MA: Harvard, 1957)
W. E. Flood, The Dictionary of Chemical Names (New York: Philosophical
Library, 1963)
Julius Grant, Hackh¹s Chemical Dictionary, 3rd ed. (Philadelphia:
Blakiston, 1944)
Oxford English Dictionary (Oxford: Oxford, 1971)
Frederick Soddy, "Radioactivity", Chemical Society Annual
Reports 10, 262-88 (1913)
Thanks
to Peter Morris of the Science Museum, London, for comments and entries.
acidum
salis: hydrochloric acid (HCl, marine acid, muriatic acid, spirit of salt);
literally "acid
of salt".
[Scheele]
actinium
C: an isotope of bismuth produced in actinium decay, namely 211Bi (half-life = 2
min).
See
table. [Soddy]
actinium
D: an isotope of thallium produced in actinium decay, namely 207Tl (half-life =
5 min).
See
table. [Soddy 1 & 2]
ad
siccum: to dryness, as in evaporation to dryness. [Scheele]
aer
fixus: fixed air
aether:
ether. Aether nitri, literally "nitric ether", was ethyl nitrate
(C2H5NO3) [Scheele].
air:
formerly a general term for any gas (elastic fluid). [Black, Cavendish,
Priestley]
alembroth,
salt of: a double chloride of mercury and ammonium, Hg2(NH4)2Cl4.H2O.
[Lavoisier]
algaroth,
powder of: antimony oxychloride (SbOCl), an emetic named after its inventor, a
Vittorio Algarotti. [Lavoisier]
alkahest:
a term invented by Paracelsus to denote a universal solvent. [Boyle]
alkali:
a basic substance. Caustic alkalis were usually hydroxides, while mild alkalis
were
carbonates.
(See alkaline air, fossil alkali, marine alkali, mineral alkali, vegetable
alkali,
volatile
alkali.)
alkaline
air: ammonia gas (NH3); see spirit of hartshorn, volatile alkali. [Priestley]
alum:
originally potassium aluminum sulfate (i.e., KAl(SO4)2); more recently the term
also
includes
salts in which sodium or ammonium substitute for potassium. [Black, Lavoisier]
aqua
fortis: nitric acid (HNO3), literally "strong water". See nitrous acid,
spirit of nitre.
[Black]
aqua
regia or aqua regis: literally "water of the king", a mixture of
concentrated nitric and
hydrochloric
acids capable of dissolving the "royal metal" gold. [Scheele]
aqua
vitae: literally, "water of life"; concentrated aqueous ethanol
(C2H5OH), typically
prepared
by distilling wine [Arnald of Villanova] (spirit of wine)
atom:
does not necessarily correspond to the modern picture of the ultimate particle
of an
element.
Dalton, for example, meant something more along the lines of "ultimate
particle of a
substance";
to him the smallest unit of a chemical compound was a compound atom (molecule
in
modern terminology), while the smallest particle of a chemical element was a
simple atom
(now
just atom, although several of Dalton's simple atoms turned out to be molecules
of
elements,
such as O2). (See molecule.)
aurum
fulminans (fulminating gold): gold hydrazide (AuHNNH2), an olive-green powder
that
can
explode on concussion [Black, Scheele]
azote:
nitrogen, named because it did not support respiration and was therefore "lifeless"
(N2, phlogisticated air; see also mephitic air). [Dalton 1 & 2, Lavoisier, Prout, T. Thomson]
barilla:
impure sodium carbonate extracted from soap-wort. [Rey]
baryta
and barytes: were both used for the earth from which barium was eventually
isolated,
namely barium oxide (BaO) [Dalton, Lavoisier, Ramsay, et al.]. Barytes can also
refer to
barite, a barium sulfate (BaSO4) mineral also known as heavy spar. Baryta can
also
refer to
barium hydroxide or its hydrate. Barytium is an older name for barium [Prout].
benzine:
ligroin or petroleum ether [Rayleigh]; sometimes benzene (C6H6)
bittern:
waste solution of magnesium salts and bromides from the preparation of salt from
sea-water
by evaporation
black
ash: impure sodium carbonate mixed with unburnt carbon (hence "black")
and
incombustible
mineral residue
black
lead: graphite, an allotrope of carbon
bleaching
powder: formed by passing chlorine gas over dry calcium hydroxide. When dry the
substance
is mainly calcium oxychloride (CaOCl2); after absorbing moisture, it becomes a
mixture
of calcium chloride and hypochlorite (CaCl2 and Ca(OCl)2)
brimstone:
sulfur (S). [Boyle]
butter:
In addition to its still current meanings of a low-melting vegetable fat or a
high
milk-fat
foodstuff, a butter could be a soft substance such as an inorganic chloride.
Butter
of
antimony was antimony trichloride (SbCl3), butter of arsenic was arsenic
trichloride
(AsCl3),
butter of tin was a hydrate of tin tetrachloride (SnCl4.5H2O), and butter of
zinc
was zinc
chloride (ZnCl2) [Lavoisier]
Cadet's
fuming liquid (Cadet's liquid): heavy brown liquid first prepared by the French
chemist Louis Claude Cadet de Gassicourt. Cadet's
liquid is highly toxic, smells strongly of
garlic,
and spontaneously bursts into flame when exposed to air. It is mainly cacodyl
oxide
([(CH3)2As]2O)
with other cacodyl compounds such as dicacodyl ([(CH3)2As]2). Berzelius
coined
the name kakodyl (later changed to cacodyl) for the dimethylarsinyl radical
((CH3)2As)
from the Greek kakodes (evil-smelling) and hyle (matter).
calcareous
earth: calcium oxide (CaO, lime, quicklime). Caustic calcareous earth was
calcium
hydroxide
(Ca(OH)2, slaked lime) and mild calcareous earth was calcium carbonate (CaCO3,
chalk,
carbonate of lime). [Black, Lavoisier]
calces:
See calx.
calcination: formation of a calx, i.e., oxidation of a metal, often by roasting. [Black; Lavoisier
1, 2, & 3; Rey]
caloric:
a postulated elastic fluid associated with heat flow. [Avogadro, Davy, Dalton,
Lavoisier]
calx
(plural calces): a metal oxide (earth), the result of roasting a metal or
mineral.
[Lavoisier
1, Rey, Stahl] Sometimes used for a particular calx, namely lime.
carbonic
acid: carbon dioxide (CO2, fixed air) [Dalton; but also Arrhenius, Maxwell,
Mendeleev,
Rutherford, J. J. Thomson et al.]
carbonic
oxide: carbon monoxide (CO) [Dalton, Gay-Lussac, Maxwell, Ramsay, T. Thomson et
al.]
carburetted
hydrogen: methane (CH4) [Dalton, Prout]
cathode
rays (sometimes kathode rays in 19th-century English translations): streams of
electrons
issuing from the cathode of an evacuated tube. They were identified as what are
now
called electrons late in the 19th century. [Perrin, Rutherford, J. J. Thomson 1
& 2]
Celsius
scale: temperature scale devised in the early 18th century by a certain Elvius
from
Sweden
(1710), a Christian of Lyons (1743), and the botanist Linnaeus (1740),
apparently
independently.
Temperatures on this scale are denoted by °C. The normal freezing point of
water is
0°C and the normal boiling point of water is 100°C. The scale was named after
Anders
Celsius who proposed a similar scale in 1742, but designating the freezing point
to be
100 and
the boiling point to be 0. The scale is sometimes also called the Centigrade
scale.
(See Fahrenheit scale, Kelvin scale, Réaumur scale.)
Centigrade scale: Celsius scale.
cerusa
(or ceruse or cerussa): white lead.
chalk: calcium carbonate (CaCO3, carbonate of lime, mild calcareous earth). [Lavoisier;
Priestley; T. Thomson]. Acid of chalk is carbon dioxide (CO2, carbonic acid, fixed air)
[Lavoisier]
charcoal:
either a charred carbonaceous material or its primary constituent, namely carbon.
Lavoisier
coined the term carbone (carbon) to distinguish the element from impure charred
material;
however, the distinction was not universally adopted right away--even in
translation
of
Lavoisier's work. [Dalton]
chymical:
Sometimes the modern term alchemical is more accurate than chemical. Similarly
chymist
often means alchemist. [Boyle]
colcothar:
iron (III) oxide (Fe2O3) by-product from sulfuric acid manufacture [Lavoisier]
copperas:
iron (II) sulfate (FeSO4.7H2O, green vitriol)
corpuscle:
generally (and still) a small particle; in the late 19th and early 20th
centuries, a
competing
name for the electron. [J. J. Thomson 1 & 2]
corrosive
sublimate of mercury: mercuric chloride (HgCl2). [Scheele]
creech:
calcium sulfate (CaSO4)
dephlogisticated
air: oxygen (O2) [Cavendish, Ingenhousz, Lavoisier 1 & 2, Priestley 1 &
2,
Watt];
also known as pure air, [Lavoisier, Priestley, Watt] or vital air [Lavoisier].
See
phlogiston.
dephlogisticated
marine acid: chlorine (Cl2, oxymuriatic acid). See marine acid. [Priestley,
Scheele]
didymium:
a mixture of praseodymium (Pr) and neodymium (Nd) believed to be an element
until
1885. [Mendeleev, Newlands]
dram (drachm):
unit of apothecary weight equal to 3.888 g. fluid dram: unit of volume equal
to 1/8
fluid ounce (3.55 mL) [Black, Scheele]
Dutch
oil (Dutch liquid, Oil of the Dutch chemists): ethylene chloride, (C2H4Cl2)
first
prepared
by the action of chlorine on ethylene (hence olefiant gas) in 1794 by four Dutch
chemists
Johann Rudolph Deimann, Adrien Paets van Troostwyck, Anthoni Lauwerenburgh and
Nicolas
Bondt.
earth: a
metal oxide (calx); see calcareous earth, magnesian earth, siliceous earth.
[Dalton,
Priestley,
Scheele, T. Thomson]
elastic
fluid: usually a descriptive term for gas (air) [Black, Dalton, Gay-Lussac,
Lavoisier, T.
Thomson
et al.]; however, certain elastic fluids were postulated which correspond to no
material
(caloric, ether, phlogiston).
emanation:
a radioactive gas (radon) produced in the decay of other radioactive elements.
Specifically,
thorium emanation (also thoron) is 220Rn (half life = 55 s) produced from the
decay of
thorium; radium emanation is 222Rn (half life = 3.8 d) produced from the decay
of
radium;
actinium emanation is 219Rn (half life = 4 s). See table. [Rutherford 1 & 2,
Soddy 1 &
2]
ether
(or aether; sometimes luminiferous ether): a hypothetical elastic fluid
postulated to
support
the transmission of light. [Clausius, Röntgen, J. J. Thomson 1 & 2] (The
organic
chemistry
meaning is still current: namely an organic compound whose formula is ROR',
where
R and R'
are alkyl or aryl groups; especially diethyl ether (C2H5OC2H5).)
Fahrenheit
scale: temperature scale devised in 1717 by D. G. Fahrenheit and denoted by °F.
The
normal freezing point of water is 32°F and the normal boiling point of water is
212°F.
(See
Celsius scale, Kelvin scale, Réaumur scale.)
fixed
air (aer fixus): carbon dioxide (CO2, carbonic acid). [Black, Cavendish,
Priestley,
Scheele et
al.]
flowers
of zinc: crude zinc oxide (ZnO, pompholix). [Lavoisier, Priestley]
fluor
and fluor spar (or fluorspar): Fluor was originally applied to readily fusible
minerals,
particularly
those containing fluorine, espeically fluorite (calcium fluoride, CaF2).
Fluorspar
for CaF2
dates to the late 18th century; fluorite to the 1860s.
fluoro
acid air: silicon tetrafluoride (SiF4) [Priestley].
fossil
alkali: sodium carbonate (common mineral alkali, marine alkali, soda)
funiculus:
an invisible membrane postulated to hold up a column of mercury in the
Torricellian
experiment
[Linus]
galena:
native lead sulfide (PbS), or lead or silver ore, or the slag remaining after
refining
lead.
Glauber's
salt: sodium sulfate (Na2SO4.10H2O), named for the iatrochemist Johann Glauber
who
prepared it; also sal mirabilis.
glucinium
or glucinum: beryllium (Be). [Newlands, Ramsay]
grain :
unit of mass. For late 18th-century French system, see livre. [Lavoisier]
gros:
Unit of mass in late 18th-century France; see livre. [Lavoisier 1 & 2]
hepar:
This Latin word for liver referred to reddish-brown (i.e., liver-colored) metal
sulfides.
(See sulphuret.) Hepar sulphuris (liver of sulphur) was a synonym either for
potassa
sulphurata (a mixture of various compounds of potassium and sulfur made by
fusing
potassium
carbonate and sulfur) [Cavendish, Priestley, Stahl] or, in homeopathic contexts,
for
calcium
sulfide (CaS).
hepatic
air: hydrogen sulfide (H2S, sulphuretted hydrogen)
igneous
fluid: a postulated elastic fluid sometimes used synonymously with caloric (matter
of
heat),
sometimes with phlogiston (matter of fire), and sometimes as a substance with
the
postulated
properties of both. [Lavoisier 1 & 2]
inflammable
air: hydrogen (H2). [Cavendish, Franklin, Priestley, Watt et al.]
ionium:
an isotope of thorium produced in uranium decay, namely 230Th (half-life = 80
kyr).
See
table. [Boltwood 1907; Soddy 1, 2, & 3]
Jupiter:
In astrological and alchemical thought, the seven heavenly bodies known to the
ancients
were associated with seven metals also known in antiquity. Jupiter was
associated
with
tin. [Helmont]
kelp:
ashes of seaweed from which carbonates or iodine were extracted
Kelvin
scale: an absolute temperature scale (i.e., one in which absolute zero is
assigned the
value
zero) named after William Thomson, first (and last) Baron Kelvin of Largs, who
first
proposed
an absolute temperature scale. One Kelvin (denoted simply K or sometimes in
older
sources
°K) is the same size as a Celsius degree, so the normal boiling point of water
is
273.15 K
and the normal boiling point is 373.15 K. (See Celsius scale, Fahrenheit scale,
Réaumur
scale.)
Libavius,
fuming liquor of (spiritus fumans Libavii): tin tetrachloride (SnCl4), which
fumes
because
it is hydrolyzed by moisture in the air to stannic oxide. First prepared at the
beginning
of the seventeenth century by the German chemist Andreas Libavius. When mixed
with
one-third of its weight of water, it forms a hydrate formerly called butter of
tin.
ligne:
Unit of length in late 18th-century France; see pied. [Lavoisier]
lime:
calcium oxide (CaO, calcareous earth, quicklime). Carbonate of lime was calcium
carbonate
(CaCO3, mild calcareous earth, chalk), and slaked lime calcium hydroxide
(Ca(OH)2,
caustic calcareous earth). [Dalton, Lavoisier, Priestley, Ramsay, et al.]
lime-water:
a saturated aqueous solution of calcium hydroxide (Ca(OH)2). [Black, Dalton,
Lavoisier,
Ramsay et al.]
litharge:
a yellow lead (II) oxide (PbO). [Marignac, Priestley]
livre:
Unit of mass in the late 18th-century France: 1 livre (Paris pound) = 16 onces;
1 once
(Paris
ounce) = 8 gros; 1 gros = 72 grains. In modern units, the livre is equivalent to
489
grams or
about 1.08 pounds in the "English" system still commonly used in the
United States.
[Lavoisier]
lye: potassium hydroxide solution (KOH)
magnesia
etc.: Magnesia alba [Black] (literally "white magnesia") was magnesium
carbonate
(MgCO3),
also known as mild magnesian earth. The metal present in this compound is
magnesium,
but was named magnium by Davy to avoid confusion with another magnesia.
Magnesia
nigra (literally "black magnesia") was the mineral pyrolusite, natural
manganese
dioxide
(MnO2), sometimes also called simply magnesia or manganese [Scheele]. Eventually
manganese
became the name of the metal present in the mineral.
manganese: See magnesia etc.
marine
acid: hydrogen chloride solution (HCl, acidum salis, muriatic acid, spirit of
salt).
Gaseous
HCl was marine acid air. [Cavendish, Lavoisier, Priestley, Scheele]
marine
alkali: sodium carbonate (common mineral alkali, fossil alkali, soda)
Mars: In
astrological and alchemical thought, the seven heavenly bodies known to the
ancients
were
associated with seven metals also known in antiquity. Mars was associated with
iron.
massicot:
a yellow lead (II) oxide (PbO).
mephitic
air: nitrogen (N2, azote, phlogisticated air) or carbon dioxide (CO2, carbonic
acid,
fixed
air, mephitic acid) [Lavoisier]
mercurius
calcinatus per se: mercuric oxide (HgO) prepared by the calcination of mercury
[Priestley,
Watt]. The substance known as precipitated mercury per se [Lavoisier,
Priestley]
or red precipitate [Priestley] is the same substance; however, because of its
different
preparation (by mixing mercury with nitric acid, evaporating, and heating the
residual
mercuric nitrate), the identity was not at first realized.
Mercury:
In astrological and alchemical thought, the seven heavenly bodies known to the
ancients
were associated with seven metals also known in antiquity. Mercury was
associated
with
mercury (quicksilver, hydrargyrum).
mesothorium:
There were two mesothoriums produced in thorium decay. Mesothorium I is an
isotope
of radium, namely 228Ra (half-life = 5.8 y); mesothorium II is an isotope of
actinium,
namely
228Ac (half-life = 6 hr). See table. [Hahn, Soddy 1 & 2]
mineral
alkali, common: hydrated sodium carbonate (fossil alkali, marine alkali, soda)
minium:
red lead oxide (Pb3O4) [Lavoisier, Priestley], also known as red lead
[Priestley].
Minium
once referred to cinnabar (mercuric sulfide, HgS) as well, but now is used only
for
its
cheif adulterant, red lead oxide.
molecule:
does not necessarily correspond to the modern conception of two or more atoms
chemically
bound together. Avogadro, for example, meant something like "ultimate
particle of
a
substance"; his elementary molecule corresponds to a modern atom and his
composite
molecule
to a modern molecule. (See atom.)
Moon
(Luna): In astrological and alchemical thought, the seven heavenly bodies known
to the
ancients
were associated with seven metals also known in antiquity. The moon was
associated
with
silver (argentum).
muriate:
chloride; see muriatic acid. [Avogadro, Gay-Lussac, Thenard, T. Thomson]
muriatic
acid: hydrochloric acid (HCl, acidum salis, marine acid, spirit of salt);
muriatic gas is
gaseous
HCl. [Black, Gay-Lussac, Prout, Scheele, Thenard, et al.]
nitre or
niter: potassium nitrate (KNO3, saltpeter). Black gunpowder was made from nitre,
charcoal,
and sulfur. [Cavendish, Lavoisier, Priestley, Rayleigh, Watt]
nitric
acid: nitrogen dioxide (NO2) [Avogadro, Dalton, Gay-Lussac, Lavoisier et al.] or
nitrogen
pentoxide (N2O5) [Prout]
nitrous
acid: nitric acid (HNO3, aqua fortis, spirit of nitre) [Lavoisier] or nitrous
acid
(HNO2)
or a mixture of these acids; or one or more of the nitrogen oxides N2O3, NO2,
N2O4,
N2O5 [Avogadro, Dalton].
nitrous
air: nitric oxide (NO, nitrous gas) [Cavendish, Lavoisier, Priestley 1 & 2]
nitrous
gas: specifically nitric oxide (NO, nitrous air) [Avogadro, Dalton, Gay-Lussac,
T.
Thomson];
or a mixture of nitrogen oxides such as that produced by the action of nitric
acid
on a
metal in the presence of air
oil of
vitriol or oil of sulfur per campanum: vitriolic acid.
olefiant
gas: ethene (C2H4) [Dalton, Prout, Thenard, T. Thomson]. See Dutch oil.
once:
Unit of mass in late 18th-century France; see livre. [Lavoisier]
oxymuriatic
acid (also oxygenated muriatic acid): chlorine (Cl2, dephlogisticated marine
acid);
named on the belief that it was a compound of oxygen and HCl (muriatic acid).
[Avogadro,
Davy, Thenard]
pearl
ash: impure calcined potassium carbonate (K2CO3)
phlogisticated
air: nitrogen (N2, azote) [Cavendish, Lavoisier, Priestley 1 & 2, Watt]
phlogisticated
nitrous air: nitrous oxide (N2O); see nitrous air. [Priestley]
phlogiston:
a hypothetical elastic fluid which was seen as a metalizing and combustible
principle.
Metals were seen as the result of combining calces with phlogiston; smelting
expelled
the phlogiston. In combustion, phlogiston leaves the combustible body to combine
with air
or saturate air. The theory of phlogiston is associated with Stahl. [Cavendish,
Priestley,
Scheele, Watt et al.]
pied:
Unit of length in late 18th-century France: 1 pied (Paris foot) = 12 pouces; 1
pouce (Paris
inch) =
12 lignes. In modern units, the pied is equivalent to 0.325 meters or about 1.07
feet in
the
"English" system still commonly used in the United States. [Lavoisier]
pinte:
volume unit in late 18th-century France, equal to 2.01508 English pints, 58.145
cubic
inches,
or 0.953 liters. [Lavoisier]
plaster
of paris: hemihydrated calcium sulfate (2CaSO4.H2O)
plumbago:
a lead ore, including lead oxide (litharge) or lead sulfide (galena); or
graphite
(black
lead). [Lavoisier, Priestley, Thenard]
pompholix:
crude zinc oxide (ZnO, flowers of zinc). [Lavoisier]
potash:
crude or purified potassium carbonate (K2CO3, vegetable alkali, pearl ash) or
crude
sodium
carbonate leached from the ashes of plant material; or potassium hydroxide (KOH,
lye) or
even potassium oxide (K2O). [Dalton, Rayleigh, T. Thomson et al.]
pouce:
Unit of length in late 18th-century France; see pied.
precipitated
mercury per se or precipitate per se: See mercurius calcinatus per se.
prussic
acid: hydrocyanic acid (HCN) [Berthollet, Gay-Lussac, Prout]
pure
air: dephlogisticated air.
pyrite
or pyrites: originally any "fire-stone" from which sparks could be
struck; eventually an
iron
sulfide or iron-copper sulfide. [T. Thomson]
pyroligneous
acid: distillate from wood, containing acetic acid, methanol, and acetone
quicklime:
calcium oxide (CaO, calcareous earth, lime). [Black, Lavoisier, Priestley]
quicksilver:
liquid mercury metal. [Boyle, Cavendish, Priestley, Torricelli]
radioactinium:
a radioactive isotope of thorium produced in actinium decay, namely 227Th
(half
life = 19 d). [Soddy 1 & 2]
radio-elements:
For occurrences before 1913 (i.e., before the concept of isotopy),
radioisotopes
is often a more appropriate modern term. See table. [Soddy 1, 2, 3]
radiolead:
a radioactive isotope of lead produced in uranium decay, namely 210Pb (half life
=
21 y).
Also radium D. See table.
radiotellurium:
An isotope of polonium produced in uranium decay, namely 210Po (half life =
140 d).
[Markwald] Also called radium F. See table.
radiothorium:
an isotope of thorium produced in thorium decay, namely 228Th (half-life = 1.9
y).
[Hahn & Ramsay, Soddy 1 & 2]. See table.
radium
A: an isotope of polonium produced in uranium decay, namely 218Po (half-life = 3
min).
[Rutherford
& Royds]
radium
C: There were three isotopes whose designation included radium C, all of which
occur
in
uranium decay. Simple radium C is an isotope of bismuth, namely 214Bi (half-life
= 20 min).
[Rutherford
1, 2, & 3] Radium C' is an isotope of polonium, namely 214Po; it is the
major decay
product
of radium C. Radium C2 is an isotope of thallium, namely 210Tl (half-life = 1.3
min); it
is a
minor decay product of radium C. [Soddy] See table.
radium D:
radiolead. [Soddy 1
& 2]
radium
F: radiotellurium.
radium
G: The isotope of lead which is the end-product of uranium/radium decay, namely
206Pb.
See table.
Réaumur
scale: temperature scale devised in 1731 by R. A. F. Réaumur and denoted by °R.
The
normal freezing point of water is 0°R and the normal boiling point of water is
80°R. (See
Celsius scale, Fahrenheit scale, Kelvin scale.) [Lavoisier]
red lead:
minium.
red
precipitate: see mercurius calcinatus per se.
regulus:
A metal was formerly called the regulus of the ore from which it was reduced;
"regulus"
(without further specification) meant regulus of antimony (i.e., antimony in
modern
nomenclature).
[Lavoisier]
retort:
a container with a long tubular neck used by chemists and alchemists for
distillation
and the
like. [Black, Cavendish, Lavoisier, Scheele]
reverberatory
furnace: a furnace constructed so that a sample placed within it is heated
from
above as well as from the fire beneath it. For example, the furnace may have a
top
which
reflects heat on the sample from the fire below it. [Black, Lavoisier]
saccharum
saturni: sugar of lead
sal
ammoniac: ammonium chloride (NH4Cl) [Black, Fahrenheit, Scheele]; also sal
armoniack
[Helmont].
sal
commune: common salt, i.e., sodium chloride (NaCl). [Scheele]
sal
enixum: potassium sulfate (K2SO4)
sal
mirabilis: Glauber's salt)
saltpeter
or saltpetre: potassium nitrate (KNO3, nitre). [Helmont, T. Thomson]
Saturn:
In astrological and alchemical thought, the seven heavenly bodies known to the
ancients
were associated with seven metals also known in antiquity. Saturn was associated
with
lead (plumbum)
scruple:
unit of apothecary weight equal to 1.296 g. [Black]
Seven
planets, seven metals: In astrological and alchemical thought, the seven
heavenly
bodies
known to the ancients were associated with seven metals also known in antiquity.
The
associations
were:
Sun
(Sol)
gold (aurum)
Mercury
mercury (quicksilver, hydrargyrum)
Venus
copper (cuprum)
Moon
(Luna)
silver (argentum)
Mars
iron (ferrum)
Jupiter
tin (stannum)
Saturn
lead (plumbum)
siliceous
earth: silicon dioxide (SiO2). [Lavoisier, Scheele]
soda:
sodium carbonate (Na2CO3, washing soda) or sodium hydrogen carbonate (NaHCO3,
baking
soda) [Dalton, Lavoisier, Prout, Rayleigh]. Caustic soda was sodium hydroxide
(NaOH) [Mendeleev].
See also fossil alkali, marine alkali, common mineral alkali.
Spanish
white: bismuth oxychloride (BiOCl) or oxynitrate (BiONO3)
spirit (spiritus):
an essence or extract that can be prepared from another substance as by
distillation
spirit
of hartshorn: ammonia (NH3) or its aqueous solution (formerly prepared from
animal
horns or
hooves); see alkaline air, volatile alkali. [Black]
spirit
of nitre: nitric acid (HNO3, aqua fortis, nitrous acid). [Cavendish,
Fahrenheit,
Priestley]
spirit
of salt (spiritus salis): hydrochloric acid (HCl, acidum salis, marine acid,
muriatic acid).
[Black,
Scheele]
spirit
of vitriol (spiritus vitrioli): vitriolic acid.
spirit
of wine (spiritus vini): concentrated aqueous ethanol (C2H5OH), typically
prepared by
distilling
wine; see aqua vitae. [Fahrenheit,
Helmont, Scheele]
sugar of
lead (saccharum saturni: lead acetate (Pb(CH3CO)2)
sulphuret:
sulfide (hepar). [Dalton, T. Thomson]
sulphuretted hydrogen: hydrogen sulfide (H2S, hepatic air). [Dalton, Gay-Lussac, Prout, T.
Thomson et al.]
sulphuric acid: sulfur trioxide (SO3). [Dalton, Gay-Lussac, Lavoisier, Prout, T. Thomson et al.]
sulphurous acid or sulphurous gas: sulfur dioxide (SO2). [Avogadro, Gay-Lussac, Lavoisier,
Prout, T. Thomson, et al.]
Sun
(Sol): In astrological and alchemical thought, the seven heavenly bodies known
to the
ancients
were associated with seven metals also known in antiquity. The sun was
associated
with
gold (aurum).
tartar
or tartar of wine: potassium hydrogen tartrate (KHC4H4O6) [Stahl], cream of
tartar (cremor
tartari) when purified into small white crystals. Tartar emetic is potassium
antimonyl
tartrate. Oil of tartar: a saturated solution of potassium carbonate (K2CO3)
[Lavoisier];
salt of tartar: solid potassium carbonate [Black, Cavendish, Rey, Stahl].
thorium
A: an isotope of polonium produced in thorium decay, namely 216Po (half-life =
0.15 s).
See
table. [Soddy]
thorium
C: The names of two radioisotopes, both produced in thorium decay, included
thorium
C.
Simple thorium C was an isotope of bismuth, namely 212Bi (half-life = 61 min);
thorium C'
was an
isotope of polonium, namely 212Po (half-life = 0.3 µs). See table. [Rutherford,
Soddy]
thorium
D: an isotope of thallium produced in thorium decay, namely 208Tl (half-life = 3
min).
See
table. [Soddy 1 & 2]
thorium
X: an isotope of radium produced in thorium decay, namely 224Ra (half-life = 3.6
d).
See
table. [Rutherford, Soddy]
trona:
natural sodium carbonate/bicarbonate (Na2CO3.NaHCO3.2H2O)
turbith
mineral (or turpeth): basic sulfate of mercury, HgSO4.2HgO. [Cavendish,
Lavoisier]
uranium
II: an isotope of uranium produced in uranium decay, namely 234U (half-life =
2.5x105
y). Uranium I is simply the most abundant isotope of uranium, 238U. See table.
[Soddy
1, 2, & 3]
uranium
X: There were two uranium X produced in uranium decay. Uranium X1 (simply
uranium
X before
the discovery of uranium X2) was an isotope of thorium, namely 234Th (half-life
=
24 d);
uranium X2 was an isotope of protactinium 234Pa. See table. [Crookes; Soddy 1,
2, & 3]
vegetable
alkali: usually crude or purified potassium carbonate (K2CO3, pearl ash),
sometimes
specified as mild vegetable alkali or fixed vegetable alkali. Caustic vegetable
alkali
is potassium hydroxide. [Davy]
Venus:
In astrological and alchemical thought, the seven heavenly bodies known to the
ancients
were associated with seven metals also known in antiquity. Venus was associated
with
copper (cuprum).
vital
air: dephlogisticated air.
vitriol:
a sulfate, especially iron sulfate. Blue vitriol was copper sulfate
(CuSO4.5H2O),
green
vitriol was iron (II) sulfate (FeSO4.7H2O, copperas), and white vitriol was zinc
sulfate
(ZnSO4.7H2O). [Scheele]
vitriolic
acid: sulfuric acid (H2SO4) [Black, Cavendish, Lavoisier, Priestley], also known
as oil
of
sulfur per campanum, oil of vitriol [Black, Lavoisier, Scheele, Stahl], and
spirit of vitriol
(spiritus
vitrioli) [Black, Scheele]. Vitriolic acid air (and sometimes vitriolic acid)
was sulfur
dioxide
(SO2), also known as sulphurous acid or sulphurous gas.
volatile
alkali: aqueous ammonia (NH3); see alkaline air, spirit of hartshorn. Concrete
volatile
alkali
refers to ammonium carbonate ((NH4)2CO3). [Black, Cavendish, Lavoisier, Scheele]
white
lead: basic lead carbonate (2PbCO3.Pb(OH)2, ceruse)