NOKAIAL PKOCESSES OF ENERGY METABOLISM 571 



TABLE 9 

 HEAT VALUE OF ONE GRAM OF EACH SUBSTAXCE IN LARGE CALORIES 



eters of Atwater and Kosa, Pompiliaii, and Lefevre ; and (4) those which 

 do not absorb the heat from the subject but which record only the effects 

 of heat in one way or another. Examples are the anemo-calorimeter or the 

 thermo-electric calorimeter of D'Arsonval, the* siphon calorimeter of 

 Richet, and the second calorimeter of Rubner. 



It is not necessary to describe more than two or three calorimeters. 

 The first method described above has never been used in studying the 

 metabolism of man and is now wholly obsolete. The second as a means 

 of following the heat production of animals has fallen more or less into 

 disfavor on account of the cooling correction which is necessary. Lau- 

 lanie(^) has overcome this to some extent by using a pair of calorimeters 

 of the Dulong type, running one of them, constructed in exactly the same 

 manner as the other, as a control of the effects of environment. With this 

 apparatus Laulanie confirmed the thermal quotients of oxygen (page 557) 

 in an apparently satisfactory manner. 



