152 THE MICROSCOPE. Oct. 



Prizes will not be awarded unless the memoirs pre- 

 sented are of adequate merit. 



The competition for these prizes is not restricted, but 

 open to all. 



Each memoir must be accompanied by a sealed enve- 

 lope enclosing the author's name and superscribed with 

 a motto corresponding to one borne by the manuscript, 

 and must be in the hands of the Secretary on or before 

 April 1st of the year for which the prize is offered. 



Subjects for 1895 :— 



(1) A study of the '• Fall line" in New Jersey. 



(2) A study of the Devonian formation of the Ohio 

 basin. 



(3) Relations of the order Plantaginaceae. 



(4) Experimental investigations in morphology or em- 

 bryology. 



Subjects for 1896 :— 



(1) A study of the area of schistose or foliated rocks 

 in the eastern United States. 



(2) A study of the development of river valleys in some 

 considerable area or folded or faulted Appalachian struct- 

 ure in Pennsylvania, Virginia, or Tennesee. 



(3) An experimental study of the effects of close- 

 fertilization in the case of some plant of short cycle. 



(4) Contributions to our knowledge of the general 

 morphology or the general physiology of any animal ex- 

 cept man. 



Note. — In all cases the memoirs are to be based on a 

 considerable body of original work, as well as on a gen- 

 eral review of the literature of the subject. 



m 



To Prevent Vegetable Sections Turning Dark.— ^oak i 

 alcohol to which 2 per cent of hydrochloric acid has been added 

 and let them dry slowly. 



Bleaching Leaves. — Chlorinated soda is the best fluid t'oi 

 bleachino- vegetable specimens. 



