PREFACE. 



The recent growth and development of the professional side of pharmacy 

 has made new text-books necessary. The present volume is the product of 

 such progress. 



The illustrations have been selected with a view to a fuller explanation 

 of the text. The descriptions of the illustrations have been made unusually 

 complete. This is to make it possible for the student to ascertain the use of 

 every article illustrated without the necessity of searching for- additional 

 information in the text itself. Some of the illustrations are from original 

 drawings, others are from electros supplied by the Bausch & Lomb 

 Optical Company and the Cutter Biological Laboratory of Berkeley, 

 California. Still others are taken from recent works on bacteriology, 

 notably Williams' "Manual of Bacteriology." 



Attempts have been made to adhere strictly to the subject from the 

 standpoint of the pharmacist, with only enough treatment of general 

 bacteriology to make clear the collateral relationships, especially as it 

 pertains to medical and commercial or industrial bacteriology. 



While this volume is primarily intended for students in colleges of 

 pharmacy, it is hoped it will also be found useful by practising pharmacists. 



San Francisco. 



