Chemistry and Physics. 213 
in the debate in the French Academy, greatly surprises us. Cer- 
. : “ 
many the study of chemistry has been during the last ten years 
almost solely directed by theories of molecular structure, and that 
uring this period the German chemists, thus guided, have done 
more to advance their science than all the other nations of the 
and if the present science of “molecular mechanics” is a legiti- 
mate branch of knowledge, then the so-called “Law of a- 
is held by the great masters of modern chemical philosophy. 
3.7, IR. 
ence was not ready for them, have lain neglected since 1863. The 
position of the h droxyl group, he finds, has a marked effect on 
whole amount of ether which it is possible to form from second- 
ary alcohols, varying from 61°5 to 66°65 per cent of the theory, is 
affect the initial rate, which is the same for all its pena 
W easily explained exceptions, but do influence the limit, 
