'906 Mr. A. H. Davis on the Heat Loss by 



R of cold wires is compared with the heat loss H from wires 

 nt a temperature (100° C ) not far removed. The table has 

 been drawn up from data already considered, and the results 



Fig. 2. 



\ 



— v 



0-5 



-i — i — | — i 

 i'5 



L o j R/c v* I 



Fig. 3. 



U 



cx 



R 



//» 



are plotted in fig. 3. To facilitate comparison with previous 

 work H/& is given instead of H, taking for k the value 

 5*77 x 10~ 5 appropriate to the temperature of the ambient 

 air. Similarly, R//3 is given. This does not alter the shape 



