150 THE MICROSCOPE. 



A new clearer for collodion, by Pierre A. Fish. 



On the blood of Cryptobranchus and Necturus, by Edith 

 J. Clay pole. 



On the structure of the teeth and bones of Paleozoic fishes, 

 by E. J. Clay pole. 



The action of leucocytes towards foreign matter, by Miss 



Edith J. Claypole. 



The effect of acid urine and solutions of chromic acid on red 



blood corpuscles, by M. L. Holbrook, M. D. 



On sectioning fern prothallia, and other delicate tissues, by 

 Mason B. Thomas. 



Parasitism of the Broom rape on beech roots. Epiphegus 

 on Fagus, by Herman Shrenck. 



A contribution to the study of the Myelin degeneration of 

 pulmonary alveolar epithelium, by Veranus A. Moore, M. D. 



A plea for the study of reagents in micro-work, by V. A. Lat- 

 ham. 



OFFICERS ELECTED FOR 1893-'94. 



For President, Dr. Lester Curtis, Chicago, 111. 

 Vice-Presidents, Prof. W. W. Kowlee, Ithaca, N. Y. 

 Prof. W. S. Miller, Madison, Wis. 

 Secretary. Wm. H. Seaman, Washington, D. C. 

 Treasurer, C. C. Mellor, Pittsburg, Pa. 

 Executive Committee, Dr. Lyman Deck, Salamanca, N. Y. 



Dr. V. A. Moore, Washington, D. C. 



Prof T. D. Biscoe, Marietta, Ohio. 



COLLECTING DIATOMS 



By F. W. MILLS, 

 htddp:rsfield, England. 

 [Chapter VII, of his " Introduction to the Study of the Diatoniacese. "] 

 The diatomist has not far to turn in quest of objects for col- 

 lection and preservation. As has already been observed in the 

 first chapter, this class of microscopic life is almost universal. 

 It may be met with in fresh, salt, or brackish water in a living 

 state, and large beds of frustules in a fossil state exist; as for in- 

 stance at Dolgelly. Our mountain streams, lakes, ponds, and 

 ditches contain vast numbers of specimens, which may be col- 

 lected all the year round. Oyster beds abound with them, and 

 the stomach of almost every fish will yield a good supply. 



