133 



These results being satisfactory as regards the formula, the den- 

 sity of the vapour was then ascertained and found to be in strict 

 accordance with theory. The method of taking the vapour densities 

 of bodies liable to oxidation was described by me about twelve months 

 ago, in the Chemical Society's Quarterly Journal. It was used in 

 the following experiments. 



1st. Weight of globe filled with air at 53 F. and 30'2 in. baro- 

 meter, 188-213 grs. 



Weight of empty globe, 186-313 grs. 



Weight of globe and vapour at 521 F. and 30'3 in. barometer, 

 192-387 grs. 



Capacity of globe at 60 F., 6'00 cub. in. 



Residual hydrogen -05 cub. in. 



Capacity of globe at 521 F., 6'40 cub. in. 



Six cubic inches of air at 53 F. and 30'2 in. barometer, become 

 at 60 F. and 30 in. barometer 6*12 cub. in., and weigh 1*90 grs. 



05 cub. in. hydrogen at 60 F. become '094 cub. in. at 521 F., 

 and weigh "002 grs. 



6-40 -094=6-306 cub. in. vapour at 521 F., which at 60 F. 

 and 30 in. barometer =3'376 cub. in. 



Hence 192-387 002=192-385-186'313=6-072 grains, the 

 weight of 3'376 cub. in. vapour. 



100 cubic inches . . = 1 79'86 grs. 

 100 cubic inches air= 31-01 grs. 



The density is therefore 5 '800, from which it appears that its com- 

 bining measure is four volumes. 



Density by calculation =5- 763. 



A second experiment gave 5 "877. 



This substance has a highly offensive odour, it burns with a bluish 

 white flame, is soluble in water, alcohol, and ether, and is slowly 

 decomposed in contact with air. 



On boiling phosphite of ethyl with concentrated solution of baryta, 

 in water, it is decomposed into alcohol and a salt which varies 

 according to the amount of baryta used. If one atom of the ether 

 be treated with one of baryta, a crystallized salt is produced on eva- 

 poration, the carbon and hydrogen in which are, according to an 

 analysis I have just completed. 



