and on the Sulphurets of Lime, 405 



1832, July 26. — Mr. Green, jiin., and Mr. John Taylor of 

 the Manchester gas works, ascended in a balloon from Man- 

 chester after 6 p.m., a fine, clear, calm evening, barometer 

 being 30 inches, thermometer 65°; the balloon took a south 

 direction, and landed in Cheshire about fourteen miles off. 

 Mr. Taylor took a bottle of air when at the highest elevation, 

 when the barometer stood at 16'8 inches, thermometer 55° \ 

 whence the altitude must have been about 15,000 feet. 



Capacity of the bottle = 2406 grains of water. 



On opening it under water in temp. 64° there entered 884 

 grains of water. 



The air was soon after its reception on the 27th transferred 

 into two small phials for examination. 



The first phial was mixed with 60 per cent, of hydrogen, 

 and fired in five portions; it yielded 20*59 oxygen per cent. 



The second phial, mixed in like proportion, gave 20*65 

 oxygen per cent. 



Air from the town the next day, fired with the same phial 

 of hydrogen as the preceding, gave 20*95 on the average of 

 fi\Q experiments. 



Air from Switzerland, &c. 



In the autumn of 1835 I was favoured with three samples 

 of air taken in elevated situations in Switzerland by my friend 

 W. D. Crewdson, jun. Esq., of Kendal. Each of these was 

 taken in a two-ounce phial by pouring out the contained 

 water and corking the phial immediately, leaving only a drop 

 or two of water within. The cork was then well closed with 

 sealing-wax. No. 1 was taken on the Mer de Glace, August 

 21, estimated at the height of 6000 feet above the sea ; the 

 second on the pass of the Simplon, August 29, at the height 

 of 6174 feet above the sea; and the third on the Wengern 

 Alp on the 15th September, at the height of 6230 feet. These 

 airs were analysed in October with the following results. 



Oxygen per cent. 

 Mer de Glace. — Average of four first experiments 20*2 

 Average of four last experiments 19*4 

 Simplon.— Average of four first experiments 19*98 

 Average of four last experiments 19*53 

 Wengern Alp. — Average of four first experiments 20*45 

 Average of four last experiments 20*11 



It may not be amiss to subjoin a few experiments on air in 

 close chambers, where a number of people have been congre- 

 gated for two hours, the air being taken at the moment of 

 breaking up. 



1802, March 6.— Got a 20-ounce phial filled at the close 



