ON THE QUANTITY OF CARBON IN CARBONIC ACID. £33 



First Experiment on animal Charcoal. 



Thermometer 60° Fahrenheit, barometer 30*23. Exp. l. On 



Muscular fibre distilled in a coated glass retort left a coal"* ° & ^ 

 black shining- coal, 4 grains of which were put into the tray. 4g ra ins from 

 Our oxigen left a residuum of 2 parts in 100. The tray muscular fibre, 

 and its contents being placed in the platina tube, was heated 

 to redness for 8 minutes. The first time the gas was Lambent 

 passed, a lambent flame filled the whole length of the glass 

 tube, and the gas became turbid or milky. It was passed turbid. 

 frequently through the heated tube, but we observed no re- 

 petition of the flashes. Hence we conjecture that if the 

 diamond had contained hidrogen, we should probably have 

 had a similar appearance. After the experiment all the ap- 

 paratus was, as usual, perfectly tight, and the Volume of 

 gas unaltered. On examining the platina tray a minute Saline matter 

 portion of charcoal remained, and a quantity of saline mat- efu 

 ter adhered to it so firmly, that it became difficult to ascer- 

 tain the quantity of carbon consumed, and we forebore to 

 make the calculation ; we however examined the gas. 



Lime water absorbed 40 parts from 100 

 The tests for oxigen 54 



Residuum ......... 6 or an increaseof 4 per ct. Residua! ^as 



increased '04. 



100 



Second Experiment on animal Charcoal. 

 Thermometer 59° Fahrenheit, barometer 29*45. ExD o n 



Some of the animal charcoal of the last experiment was animal char- 

 heated to redness under sand for one hour, four grains °° a 

 were placed in the platina tray ; and as we were so much 

 embarrassed in the last experiment with the saline matter 

 w|vich adhered to the tray, we exactly balanced it with its 

 contents. Our oxigen, made as usual, left a residuum of 2 

 parts in 100, and we began with 49*34 cubic inches. When Flashn>oi' 

 every thing was adjusted, and the platina tube red hot, on n S lu « 

 parsing the oxigen, flashes resembling lightning ran along 

 the glass tube ; and this was repeated 5 or 6 times. The Gas tul fc- I( j # 

 whole of the gus became very cloudy, exhibiting a turbid 



*iilkj 



