140 



SCIENCE PROGRESS. 



Table III. 



I do not see that any advantage is gained by taking 

 the mean of these values ; we must weigh the evidence 

 in each case, and use our individual judgment ; mere 

 counting of heads will not suffice. 



The result of Professor Schuster's investigations may 

 lead to a modification of the values of Joule and Row- 

 land as well as add another determination of great weight 

 to the list. 



I would suggest that, in the meantime, the traditional 

 1390 and 772-55 should disappear from our text-books 

 and be replaced by (say) 1402 and 779. 



E. H. Griffiths. 



