64 CURRENT NOTES AND MEMORANDA. 



This cement sets rapidly ; when once dry, it cannot be redis- 

 solved, either by moisture or heat. — Moniteur des Produits Che- 

 7niques. 



The above is extracted from the " Chemical Review," to which 

 the editor adds : — " According to our experience, the dry caseine 

 should be ground up, not in water, but in ammonia, solution of 

 borax, or in lime-water. We prefer to obtain the caseine, not 

 from cheese, but from butter-milk, which is precipitated with 

 acetic acid, using as little as possible. The precipitate is repeatedly 

 stirred up in hot water, and thus washed by decantation, until all 

 the fatty matter is removed. It may then be dried and pressed 

 as above." 



If this cement cannot be re-dissolved either by moisture or 

 heat, we think it will make a splendidly firm cement for affixing 

 glass or metal cells to glass slips ; at any rate, it is worth a trial. 



Mr. J. Walter Fewkes, of Cambridge, Mass., U.S.A., has 

 very courteously sent us No. 9 of Vol. XL of the " Bulletin of 

 the Museum of Comparative Zoology at Harwood College." This 

 is a most instructive and exhaustive paper "On the Development of 

 Certain Worm Larvae." It is illustrated with 8 double plates. 



Mr. Charles Bailey, F.L.S., has kindly sent us a reprint of 

 his paper " On the structure, the occurrence in Lancashire, and 

 the source of Origin oi Naias grami?iea, Del, var., Z^<i'///^/, Magnus," 

 read to the Leeuwenoek Microscopical Club, and to the Man- 

 chester Literary and Philosophical Society. Some idea of the 

 exhaustive nature and interest of this paper may be formed from 

 its consisting of 31 pages, illustrated with 89 engravings, and 4 

 litho plates. 



Offers of Exchange or otherwise wanted for a first class No. 1 1 

 Immersion, o.g., by Hartnack and Prazmowski. Apply to J. S. G., 

 14, High Street, Chelmsford, Essex. 



Many notices and other important articles have been pressed 

 out of the present issue ; they will appear in the April part. 



