196 CURRENT NOTICES AND MEMORANDA. 



the June part, is Mr. Herbert Spencer. The illustrations are 

 excellent ; Vol. I. is completed with the present part. In July, 

 we understand that " Science Monthly " will be permanently dou- 

 bled, both in size and price. 



The Naturalist's World and Scientific Record, has also 

 been enlarged from i6 to 20 pages, without an increase in price. 

 We are glad to see this, and to notice that the interesting character 

 of its articles is well sustained. 



Cotton, Wool, and Iron : The Boston Journal of Com- 

 merce. {Boston^ U.S.A.) 



This is the most readable of all the trade Journals it has been 

 our fortune to meet with. The Microscope, in its Editor's hands, 

 finds constant employment, and appears to do good work in the 

 detection of adulteration in the various fibres. A long article is 

 devoted in the last copy received, to the detection of the " Oil- 

 pocket " in the fibre of cotton. 



We have mounted a great number of the specimens prepared by 

 Mons. S. Louis (France), and sold by Mr. Wm. West, of Bradford, 

 and find them well prepared, abundantly supplied, and that they 

 make very excellent Slides. 



Each series is supplied in a neat wood box, the Diatoms, 

 Algae, and many other objects, being in separate glass tubes. 

 Directions for mounting will be found in each box. 



Messrs. Sinel & Co.'s Unmounted Marine Objects. 



A correspondent writes us that he obtained a tube of the fol- 

 lowing Marine organisms, viz : — Porcellana lo7igicornis., Hippolyte 

 varians, Nebalia bipes^ Asteria gibbosa, Ophiocoma neglecta., and 

 Gammarus marmits. 



When mounted in cells, with preservative media, some very 

 beautiful results were obtained, particularly when the spot-lens 

 and 2-inch objective were used. 



Exchange. — Wanted, Diatoms, on Algae or in mud, from all the 

 tropical seas. Will give in exchange a large quantity of fine 

 selected diatoms, or other slides, or cash. 



J. C. Rinnbock, 



14, Simmering, Wien, Austria. 



