﻿938 



Mr. A. H. Davis on Natural 

 Fig. 3. 



2Q0 



100 



^ 

 ± 



+ Gases 



a CCl 4 



x Aniline 



• Glycerine 



O Olive Oil 



10 



1000 10.000 



The Cooling Power of Fluids. 



It appears from the theoretical considerations and experi- 

 mental evidence put forward in this paper and previously, 

 that the convective cooling of similar bodies immersed in 

 fluids may be represented by the formula 



hL/kS = F (c 2 gL*a0/k 2 )f{cv/k) , 



and the form of the function f(cvjk) is now indicated to be 

 such that we may write the simpler expression 



JiL/kd = F(IMgac/kv). 



It is to be expected that such a grouping of variables is of 

 more general applicability than for the special case of infinite 

 fluids, especially in so far as it can be obtained from the 

 Principle of Similitude. Where liquids by their natural 

 convective motion carry heat from a hot surface and yield it 

 to a cold one, as with the common case of a hot body 

 immersed in a fluid contained in a cooler vessel, one would 

 in general expect approximate agreement with the formula 



