CAEBON DIOXIDE AT DIFFEEENT TEMPEEATUEES. 



211 



as varied as possible, an experiment was performed with a rise in temperature of 

 10 C., the results were found to be consistent with the above to 1 part in 1000. 



ATMOSPHERIC Temperature. 



STEAM Temperature. 



(13) Theoretical Examination of the Variation of the Heat Loss with ike Flow.* 

 The elementary theory given on pp. 200 and 201 involves the assumption that the heat 

 loss for a given rise in temperature of the gas depends only upon that rise in tempera- 

 ture and is independent of the rate of flow, which is not strictly true, since the heat 

 loss also varies with the form of the temperature curve between the heating coil and 

 the thermometer H, and this varies slightly with the flow. It is possible to consider 

 theoretically the effect of the principal causes which make the heat loss a function of 



* The corrections discussed in this section are all very small, but it has been thought advisable to give 

 a fairly detailed account of them, since an exact estimate of their importance cannot readily be made 

 without a rather close examination of the conditions which govern the heat loss. 



2 E 2 



