112 THE MICROSCOPE. July 



THE MICROSCOPE. 



Contents for July, 1894. 



Objects Seen Under the Microscope. XIV. — Some New Desmids (Illus- 

 trated) 97 



The Microscope in the Dairy, by Prof. H. W. Conn 98 



How I Got Tourmaline for ray Microscope, by Hans M. Wilder 104 



Models for Constitution and By-Laws of a Microscopical Society. — V. 



Constitution of the Ottnmwa Microscopical Society 105 



Editorial. — Micro-organisms in Water 106 



Opium 106 



Questions Answered. — By S. G. Shanks, M. D 107 



194. A Linen-prover 107 



195. A Lucernal Microscope 107 



196. Swift, Crouch or Beck. Which? 107 



197. Grinding Rock Sections 108 



198. Separating Foramenifera 108 



199. Standard Tube-length 108 



200. Publications upon Rhizopoda 109 



Practical Suggestions. — By L. A. Willson 109 



How to Examine Pollen 109 



Staining and Mounting Pollen 109 



Paste Eels 110 



Correspondence. — To Begin With 110 



Recent Publications. — The Journal of Marine Zoology and Micros- 

 copy 110 



Biology of Ferns by the Collodion Method. Atkinson Ill 



Clark's Practical Methods in Microscopy. 



This book is written for beginners and gives in detail descrip- 

 tions of methods that will lead the novice to successful results. 

 Cloth, 233 pages, 41 cuts and 17 reproductions of photo micro- 

 graps, $1.60. 



"This is an excellent elementary book, having the rare merit of directness and clearness.— Rev. 

 J. D. King. 



"We have had much experience with the perplexities of beginners, and unhesitatingly com- 

 mend this book to their use as the best book of its kind published."— The Observer. 



Sent by mail postpaid on receipt' of price. 



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