The Microscope. 137 



White Zinc Again. — There is no man in this country more 

 competent to speak of the value of White Zinc as a mounting 

 medium than Mr. Walmsley, of Philadelphia. In the first 

 place Mr. Walmsley experimented a great deal with White 

 Zinc, and as a result finally gave us his well-known cement ; 

 and in the second place he has had the opportunity of watch- 

 ing its durability as no one else could. He has had thousands 

 of mounts finished with this cement right before him for years, 

 and his testimony should be taken as a conclusion of the whole 

 matter. Mr. Walmsley simply states a truth, but in so doing 

 he gives a scathing rebuke to that class of people who are hap- 

 piest when deteriorating the works and opinions of others. 



Mr. E. E. Jackson, of Columbia, S. C, writes that he has 

 a number of mounts finished with White Zinc by Mary A. 

 Booth, and " they are neat and solid, unchanged by travel or 

 time." 



We have just been able to procure some missing num- 

 bers of the Journal of the Royal Microscopical Society, 

 which makes our set complete from the first number to the 

 present time. To our collection of old books on Microscopy 

 we have recently added "Marcelli Malpighi. Opera omnia. 

 1687." 



That " pride goeth before a fall " is well illustrated by the 

 fact that while the above personal item on our special library 

 partakes ol the " pride ", this item includes the " fall " ; for 

 Prof. A. Y. Moore tells us of some errors in the proof-reading 

 of his article in our May number that need correcting. Page 

 102, line 4, should read, "Two of these are made of crown glass 

 and the others of Hint glass" etc. Page 106, line 9, the word 

 "pressure" should read presence. 



If you noticed a blue pencil mark on the wrapper of your 

 journal, it is a gentle hint that we would gladly receive a dollar 

 from you for 1885. Please send us your renewals as soon as 

 possible. 



"Among the elections were those of the lady fellows, the 

 first under the new by-law, one of them being the joint editor 

 of a Microscopical Journal well known in America and this 

 country." — Royal Mic. Journal, for April. 



