Combination of Bodies 'vcilh Oxygen. 335 



M 715 c.c. 793 c.c. 697 c.c. 



B 30-16 in. 30-14 in. SO-lOin. 



T 6°-7 6°-9 7°-4 



E r-7 2°-3 l°-3 



I 3°-077 3°-4.36 3°-027 



Ic 3°-099 3°-471 3°-041 



W 1617 grms. 1599 grms. 1611 grms. 



V 117 grms. 117 grms. 1 1 7 gims. 

 1. 2. 3. 



7717 7728 7684 



From these data we obtain for the heat evolved during the 

 combination of — 



One gramme zinc with oxygen . 1301 

 One gramme oxygen with zinc . 5366 

 One Htre oxygen with zinc . . . 7710 



Diilong found from 7378 to 7753 for the heat given out 

 during the combination of one litre of oxygen gas with zinc. 



I)-o?i and Oxygen. 



The experiments with this metal were performed in the 

 same manner as the preceding, with this difference, that no 

 (juartz was added to the finely divided metal. The ignition 

 was effected by means of O'OOl grm. phosphorus. 

 M 957 c.c. 982 c.c. 859 c.c. 



B 30-21 in. 30-06 in. 30-01 in. 



T 7°-9 7°-4 8°-6 



E l°-4 l°-2 0^-8 



I 3°-180 3°-272 2°-821 



Ic 3°-193 3°-281 2''-S22 



W 1610 grms. 1611 grms. 1615 grms. 



V 117 grms. 117 grms. 117 grms. 

 1. 2 3. 



5935 5970 5914 



We have, therefore, for the heat evolved during the com- 

 bination of— 



One gramme oxygen with iron . 4134 

 One litre oxygen with iron . . . 5940 



Tin and Oxygen. 

 In the experiments with this and the remaining niclals, the 

 amount of oxygen was ascertained by deteri;;ining the increase 

 of weight of the metal alter the combustion was finished. The 

 till was mixed with half its weight of pulverized and recently 

 ignited c|uarlz, and the weight of the mixture carefully ileter- 

 niined both before and after tlic experiment. To produce 



