10 



PRESIDENTIAL ADDRESS. 



ploral Dcvclopn^ci^t aijd En^bryo^ci^y 

 ii> Wbeat, 



ARTHUR H. DUDLEY. 



" For nature also, cold and warm. 

 And moist and dry, devising long. 

 Thro" man}' agents making strong. 

 Matures the individual form."" 



— Tennysflii. 



At this Annual Meeting we congratulate our Society on 

 the attainment of its Fortieth Birthday. Its past shows a 

 continuous record of good work, the present, instinct with 

 living interest in all branches of microscopical science, 

 inspires confidence in a future of great usefulness. 



I am proud that at this special juncture in its history 

 you have conferred upon me the honour of being 

 president. I thank you heartily, and it will be my aim 

 to maintain, so far as I may be able, its honourable 

 traditions. 



The address it is my privilege to submit to you to- 

 night is far from complete, through limited time for 

 preparation and lack of suitable material to illustrate 

 important stages of development. 



For the lantern slides and many useful suggestions 

 I am indebted to our good friend the Secretar\'. 



The shdes are from micro-preparations of material 

 gathered at various times and places, fixed in tlie field in 

 chrom-acetic acid solutions, embedded in paraffin, 



