PREFACE. vu 
my processes and formule ; and in the Physiological 
Section of this work I have mdicated the animals and 
parts best fitted for displaying the facts here described, 
with the best way of preparing them for microscopical 
examination. And in conclusion I may add, that I 
shall be glad to show, to such as are interested in the 
subject, those preparations in my possession which 
have been frequently referred to in the body of this 
work. 
G,. BR: 
9, Cuurcu Roan, Homerton; 
October, 1858. 
