204 APPENDIX. 
Lrmery (Nicholas). Prep. of Solar Phosph.: Cowrs de Chy- 
mie. (1675; the best edition of this remarkable work was 
published at Paris in 1713.) Lemery’s knowledge of Phos- 
phorescence was greater than that of any man of his time. 
The pages 482, 483 et seq. of his work on Chemistry, may 
be read with interest at the present day. It is exceedingly 
remarkable that his explanation, constantly repeated, of the 
light being owed to rapid molecular motion, is precisely that 
which is becoming adopted at present. 
Bavpvuin. (Some authors write his name Balduin, and Baldwin.) 
On his Phosphorus produced from Nitrate of Lime. Phos- 
phorus Hermeticus, sew magnes Luminaris, 1675; see also 
Phil. Trans. Abrid. ii. p. 368. 
Homsbere. On his Phosphorus. Mémoires de ? Académie de 
Paris, 1698, p. 307. He prepared it by heating sal-ammoniac 
and chalk. The result was carbonate of ammonia which 
distilled and dry-fused chloride of Calciwm, which shines in 
the dark when struck. 
Havxssez. On the Luminosity produced by the Friction of 
Mercury in the Barometer Vacuum. Physico-mechanical Ex- 
periments. (London, 1709.) “* Experiments on the attrition 
of bodies in vacuo: Phil. Trans., 1705. In this paper the author 
proves by direct experiment, that when steel is rubbed against 
flint, the sparks are not produced without the presence of air ; 
hence it was afterwards discovered that, in this case, the light 
is produced by the rapid combustion of small particles of 
steel. 
Bovryes (Father). ‘Concerning the Luminous Appearance 
observable in the Wake of Ships,” &c.: Phil. Trans., 1718. 
I have not alluded to this paper in my historical notes, as the 
author brings forward no observations of particular value, and 
has not the most remote idea of the true cause of this phos- 
phorie appearance. “The production of the light,” he says, 
“depends very much on the quality of the water.’ The au- 
thor’s observations are however interesting, as having been 
made in the Indian Seas. 
