674 BOOK REVIEW 



mann reaction is a sort of Widal test done with the Treponema 'palli- 

 dum. In correcting this state of affairs, the author will be a valuable 

 missionary, since the entire tone of the work is one which will appeal 

 to the practicing physician and give him such a wealth of interesting 

 knowledge, that he will read it — and after all, the fact that it will 

 be read is not the least important quality of a printed book. 



Hans Zinsser. 



