Anahfis of the Air. 187 



OyfkruSell,Oak,Muftard~ feed, Indian- wheat, 

 Peafe, Tobacco, oil of Annifeed, oil of Olives, 

 Honey, Wax, Sugar, Amber, Coal, Earth, 

 JValtan Mineral, fca Salt, Salt-petre, Tar- 

 tar, Sal Tartar, Lead, Minium. Thegreateft 

 part of the Air obtained from all which bo- 

 dies was very permanent, except what the 

 Air of Tartar loft in {landing feveral days. 

 Particularly, that from nitre loll little of 

 its elafticity, whereas moft of the Air ob- 

 tained from nitre, in diftilling with the re- 

 ceiver ( Fig. 33.) was reforbed in a few days, 

 as was alfo the Air which was generated from 

 detonized nitre in Experiment 102. Kence 

 alfo we fee the reafon, why 19 parts in 20, 

 of the Air which was generated, by the firing 

 of Gunpowder, was in 18 days reforbed by 

 the fulphureous fumes of the Gunpowder. 

 As Mr. Hawksbee obferved, in his phyfico- 

 mechanical Experiments, page 83. 



In the diftillation of Horn, it was obfer- 

 vable, that when towards the end of the ope- 

 ration the thick foetid oil arofe, it formed 

 very large bubbles,with tough unftuous skins, 

 which continued in that ftate fome time 5 

 and when they broke, there arofe out of 

 them volumes of fmoak, as out of a chimney, 



and 



