90 The Microscope. 



the press about the first of November last. "We issued a large 

 edition, but during the past five months very nearly one-third 

 of the whole number has been sold The work has been re- 

 written and newly illustrated, and changed from a small 8 vo. 

 of 270 pages, to a large 8 vo. of 370 pages. We are especially 

 desirous of having those who own copies of our former editions 

 possess this work, which more nearly represents our present 

 understanding of this difficult subject. To such persons we 

 make the following offer: If you will mail us your copy of the 

 old edition, we will deduct seventy -five cents from the regular 

 price of the third edition, which is $3.50. Copies of former edi- 

 tions cost you but $1.25 each. Or if you will mail us your old 

 copy we will send you a copy of the third edition and this jour- 

 nal one year for $3.50, which is the price of the book alone. 

 This edition is so unlike its predecessor that it is practically a 

 new book. 



We have seen a large number of slides of arranged diatoms, 

 but the one lately presented to the Junior Editor surpasses 

 them all. It is the work of Mr. J. C. Rinnbach, of 14, Simmering, 

 Wien, Austria. It consists of 222 diatoms arranged in the most 

 exquisite and artistic pattern. In a beautiful photomicrograph 

 which Mr. Walmsley made of a slide arranged by this same 

 party, and now in the possession, we believe, of Mr. Christian, 

 of Richmond, Va., there are not quite as many diatoms and 

 some are imperfect. In this slide each diatom appears perfect 

 and in its right place. It is a marvel of workmanship. We 

 shall try to induce Mr. Walmsley to photograph it for us. 



We call especial attention to some particular features of 

 The Microscope for this year. The articles on " Embryology " ; 

 the regular communications by Dr. Stokes ; the " results of 

 microscopical research"; the regular contributions by Prof. 

 Moore ; the regular translations giving " new methods of work" ; 

 all these are special features, and show the success of our 

 journalistic enterprise. We have other features in course of de- 

 velopment ; but the growth will be much more rapid if our 

 readers will simply show a copy of the journal, or mention it, to 

 a friend interested in microscopical work. 



The number of new subscribers since January 1st, has been 



