where 



Natural Convective Cooling of Wires. 



A = (3-2<7)/(5-6<r), 



B = (ll-26o-+16o- 2 )/(5-6(j)(3-4o-), 



C = 2(l-o-)/(3-4o-). 



Fig. 6. 



329 



A curve of this family is shown on fig. 6, marked " displt." 

 The point nearest the axis lies on the cone above referred to, 

 as shown by the upper broken line. Its angle in the present 

 case (o~ = J) is about 74*8°. 



XXXI. Natural Convective Cooling of Wires. 

 By A. H. Davis, B.Sc* 

 [From the National Physical Laboratory.] 



(1) Introduction. 



THE object of this paper is to investigate the apparent 

 discrepancy between published data for the natural 

 convective cooling of wires and the hydrodynamical theory 

 of the phenomenon. 



" Convective cooling " is taken to refer to the total heat 

 * Communicated bv the Author. 



