TO HERBERT McLEAN EVANS 

 ON HIS SIXTIETH BIRTHDAY 



Y-ouR COLLEAGUES, stucleiits and other friends dedi- 

 cate this vohime to the celebration of your anniver- 

 sary with the confident liope tliat the truth you have 

 so zealously sought these forty years may not be prosti- 

 tuted or strangled in the black and desolate years that 

 loom ahead. 



Your pursuit of truth and natural law has brought a 

 fuller knowledge and understanding of fundamental 

 problems in embryology, histology, and physiolog)'. Wis- 

 dom, the brightest jewel in the crown of scholarship, has 

 joined originality, insight, and energy in your labors. We 

 look forward to watching your keen and effective pursuit 

 of truth for many years to come. 



Your understanding and enthusiasm have inspired all 

 who have worked with you and spurred them on to their 

 utmost efforts. Your example continues to guide and stim- 

 ulate them. We look upon you as one 



Of those who conquered, inch by difficult inch, 

 The freedom of this realm of law for man; 

 Dreamers of dreams, the buildeis of oui hope. 



