AND MEMORANDA. 259 



chapters on The Northernmost Inhabitants of the Earth (with 21 

 illustrations), and On the Condylarthra (continued from August 

 part, with 28 engravings and 3 plates) are deserving special 

 attention. The " General Notes," which form an important item 

 in each issue, are of much value. 



The Journal of Science and Annals of Astronomy, Biology, 

 Geology, Industrial Arts, Manufactures, and Technology ; as its 

 title implies, covers a large range of subjects. Our general read- 

 ers will find every article more or less to their tastes. 



The American Monthly Microscopical Journal for 

 August contains the following amongst a series of good papers : — 

 Growing Slides, or Microscopical Vivaria ; Rapid Method of 

 making Bone and Teeth-Sections ; Pond-Life in Winter ; Micro- 

 scopical Technic, etc. 



The ^Microscope for August continues its joke about the 

 " Fakir's Secret," and tells us how to produce " Paste Eels " ; 

 Studies in Histology, Lesson 5, is on Metallic Stains and Mount- 

 ing; A New Solid Watch-Glass is described, to be used as a 

 staining or dissecting dish, etc. etc. 



Cotton, Wool, and Iron comes to us with great punctuality. 

 We are glad to notice that the editor of this Journal, as well as 

 the editor of another important Journal — The American Jour- 

 nal OF Fabrics — are directing their attention, in real earnest, to 

 the microscopical examination of fabrics. In addition to the 

 purely technical articles we naturally look for in such journals, 

 there is an abundance of interesting matter. 



Apropos of our article in the current part on the " Preparation 

 and Mounting of Diatoms," we have received from Mr. C. Henry 

 Kain a double slide oi Navicula rhomboides^ the diatoms under one 

 cover-glass being mounted in Canada Balsam, those under the 

 other in Balsam of Tolu. We are struck with the extra clearness 

 of the Tolu mount, although the medium is not nearly so colour- 

 less as the Balsam. Mr. Kain does not give us the formula for 

 preparing the medium. 



Van Nostrand's Engineering Magazine for September (New 

 York, U.S.A.) contains, in addition to a large amount of informa- 



