PEEFACE TO THE SECOND EDITION 



IN the preparation of the second edition I have been guided by sug- 

 gestions and criticisms made by teachers who have used the first edition. 

 There appears to be very general agreement that the plan and scope of 

 the book meet the desires of teachers and students of Histology in Medi- 

 cal Schools. The chief point of disagreement among teachers concerns 

 the teaching value of the photomicrographs. I have tried to compromise 

 the conflict of opinion on this point by substituting drawings for the less 

 satisfactory photographs of the first edition. A number of new illustra- 

 tions have also been added. To meet the demand for a laboratory guide, 

 in general conformity with the text, a chapter has been added on "Direc- 

 tions for Laboratory Work." 



In the first edition I used freely of the illustrations and certain por- 

 tions of the text in Ferguson's "Normal Histology and Microscopical 

 Anatomy." My indebtedness for this material was recognized by publi- 

 cation under joint authorship. The present revision has made the work 

 more exclusively my own, and I now assume sole responsibility for the 

 book as it stands. Certain portions, however, still remain in essentials 

 as originally published in Ferguson's excellent book, and I am under 

 deep obligation to my friend and former colleague for this aid to my 

 efforts to produce an acceptable textbook of Histology. 



To all those who have in any way helped, especially by constructive 

 criticism and by the loan of drawings for new illustrations, to improve 

 the book in a second edition, I desire to express my gratitude. I am 

 also again greatly indebted to my publishers for very generous co- 

 operation in the work of revising the text and of changing many illus- 

 trations. 



HAKVEY ERNEST JORDAN. 



LABORATORY OK HISTOLOGY AND EMBRYOLOGY, 

 UNIVERSITY OF VIRGINIA. 



