and of Combustion of Acetylene, Ethylene and Methane. 351 



Minutes. 



Temperature, 



18 



4-100 



21 



4-090 



24 



4-080 



27 



4-070 



Reducing as before the resulting value is 53,400°. 



Experiment 5. — Acetylene, 5'3829 grams ; jacket, 4 ; room, 

 4 # 5°. The residual gas contained too small a quantity of acety- 

 lene to measure. 



Water and water equivalent of 

 calorimeter, 3250 grams. 



Minutes. 



Temperature, 







45 



3 



0-47 



6 



0-49 



9 



0-51 



12 



3-892 



15 



3 887 



18 



3-880 



21 



3-875 



24 



3-875 



27 



3-870 



30 



3-865 



Temperature interval, 



3-887 — 0-51+0-007 = 3-384 ( 



The resulting value is 53,200°. 



Experiment £.— Acetylene, 4*043 grams ; jacket, 3 # 6' 

 residual gas was free from acetylene. 



Th. 



Minutes. 



Temperature. 







1-05 



3 



1-07 



6 



1-083 



9 



1-097 



12 



3-649 



15 



3-645 



18 



3-642 



21 



3-640 



Water and water equivalent of 

 calorimeter, 3252 grams. 



Temperature interval, 

 3-645 — 1-097 + 004 



2-552 



The resulting value is 53,300 c . 



Omitting experiments 1 and 3, the following are the results of 

 the determinations of the heat evolved on exploding acetylene : 



53,300 



53,200 

 53,300 



The average is 53,300° for 26 grams and 2050° for 1 gram of 

 acetylene. 



Experiment 7. — The bomb with a capacity of 602°° was filled 

 with dry gas (9T"4 per cent by volume of acetylene) at 20'7° 

 and 756 rarn . The calculated weight of this volume of acetylene 



