Page 49
IG N IT IO N IN R A R E F IE D A IR
f i A flintlock which has been screwed on the plate of the air-pump and is pulled
by a sliding wire.
t 2 A glass bell-jar and apparatus to make gunpowder fall on a red-hot iron in
rarefied air.
f 3 The apparatus to let small chips of wood on red-hot iron (in rarefied air),
according to ’s Gravesande, LXXXII, fig. 3.
Page 50
A P PA R A TU S FOR F LAME AND SMOKE
1 An Argand lamp.
2 A similar, arranged differently, and to which can be screwed a tap, to let
different air flow through the lamp.
f 3 The lamp of inflammable air according to Ehrman.
f 4 The apparatus o f ’s Gravesande for lengthening the flame, LXXXII, fig. 1.
f 5 The compound lamp of Musschenbroek for lengthening the flame, Introd. ad
philos, natur., XXXV, fig. 2.
J 6 The lamp and apparatus to fan the flame by means of pure air.
t 7 A lamp of Argand, arranged for small chemical experiments.
Page 51
C A LO R IM E T R Y
t i The calorimeter of Lavoisier and of La Place [jz'c], Lavoisier, Traité elém.,
VI, fig. 1-8.
2 The apparatus of Crawford for the measuring of heat, Crawford, Exper. on
Animal Heat, II & III.
t 3 Wedgwood’s thermometer, Phil. Trans., vol. Ixxii.
4 Three glass bulbs, in which a thermometer is suspended, in a brass water-
trough, used to demonstrate the different dispersions of heat in different substances,
according to Thomson, Phil. Trans., vol......
f 5 Pictet’s apparatus to show that heat disperses more upwards than downwards,
Pictet, Essais de Physique, p. 33.
Page 52
EU D IOM E TR Y
1 The eudiometer of Volta, with which to test the condition of the atmospheric
air by the mixing and ignition of inflammable air.
2 The eudiometer of De Magellan.
f 3 The eudiometer of Fontana.
f 4 The eudiometer of Guyton. Bouillon La Grange, Manuel d’un cours de Chimie,
i, p. 187.
Page 53
E L E C T R IC IT Y
Electrical apparatus
I The large electrical machine, and all the apparatus belonging to and used with
it, described and illustrated in volumes iii, iv and ix of the Verhandelingen.
f 2 The smaller electrical machine with a plate of 31 inches diameter, described
in the appendix of the above-mentioned volume ix.
3 The electrical machine consisting of a lacquer-plate that is rubbed by mercury;
described by Van Marum in a transaction on electricity, Groningen,
1776.
4 Nairne’s electrical machine, consisting of a glass cylinder, with it the necessary
apparatus to electrify patients; illustrated in Nairne’s Description of a
Patent Electrical Machine, London, 1783.
f 5 The electrophore of Volta, improved by Van Marum and Van Troostwijk,
described and illustrated by the same in the Verhandelingen van het Ba-
taafsch Genootschap, volume 7.
Page 54
E L E C T RO M E T E R S
i Two electrometers of Canton, Phil. Trans., vol......
f 2 The electrometer of Cavallo.
3 The electrometer of De Saussure.
4 The electrometer of Brooks,
f 5 The electrometer of Bennet.
f 6 The electrometer of Bennet in a wider glass.
7 The micro-electrometer of Maréchaux.
Page 55
CO NDENSERS, CO L L E C TO R S E T C .
f i The condenser of Volta, of white marble.
I 2 The condenser of Volta, being a lacquered brass plate.
3 The collector of Cavallo, Phil. Trans., vol......
4 The condenser of Nicholson, Phil. Trans., vol......