J 12 0K THE ** EAT DEVELOPED IN COMBUSTION. 



Experiment to To give an idea of the reliance that may be placed on 



ascertain the ^ results of the experiments made with the new appa- 

 perfection of ... rr 



:*e apparatus, ratus I have just described, I will introduce here the 



particulars of an experiment, made purposely to discover 

 its degree of perfection. 



Having filled two receivers, properly connected with 

 each other, with water at the temperature of the air of the 

 room, 55° F., I burned a wax taper under the mouth of 

 the principal receiver, so that all the products of the 

 combustion passed through the worm of the secondary re- 

 ceiver, after having traversed that of the principal. Each 

 of the receivers contained 2371 gr. [36621*5 grs.] of water. 

 The following are the results of the experiment. 



Time of the observation. Temperature of the water 









in the principal 



in the secondary 



lours 



Min. 



Sec. 



receiver. 



receiver. 



9 



37 





55° 



55° 





49 



42 



65 



55 





56 



J5 



70 



55 



10 



o 



52 



75 



55| 





9 



32 



80 



55| 





16 



34 



85 



55i 





23 



£4 



90 



55 £ 





27 







56 





31 



40 



95 



56£ 





39 



35 



100 



5G$ 





47 



40 



105 



56* T 



The secondary From the results of this experiment it appears, that the 

 receiver not water in the secondary receiver did not begin to be heated 

 lowfn^ex 6 Si" perceptibly, till that in the principal receiver had been heated 

 ments as un- 15° or 20°: and, as I had intended from the beginning never 

 necessary. ^ COli tinue an experiment longer than was necessary to raise 

 the temperature of the water in the principal receiver 10° or 

 12° F. ; it may be supposed, that, as 60on as I found by this 

 experiment how little heat remained in the products of com- 

 bustion after they had passed through the worm of the prin- 

 cipal receiver, 1 relinquished my original design of operating 

 with the two receivers joined together. As it was evidenr, 

 I from the above, results, that the srcond receiver could never 



be 



