160 



THE AMEKICAN MONTHLY. 



[August. 



sible he would draw his toothpick, which 

 was sticking in the invisible bottle, and 

 spread the water over the surface of the 

 glass. Just enough of the sour paste ad- 

 hered to the toothpick and was deposited 

 on the glass to carry a number of the liz- 

 ards with it. The glass, so prepared, 

 would be placed under the magnifier, and 

 the water would be found to be alive with 

 transparent lizards that seemed never 

 tired of flashing back and forth under the 

 glass. Dr. Shillito exposed the trick to 

 a number of friends last evening, after 

 having successfully made them believe 

 that it was the water alone that they were 

 examining. — Newspaper. 



— We learn from a letter of Mr. E. C. 

 Bousfield to Science Gossip that at some 

 future time there is likely to be published 

 a monograph on rotifers by Dr. Hudson, 

 many fine drawings for which are ready. 

 The same writer mentions the fact that the 

 male of the common Rotifer vulgaris has 

 not yet been described, and of about two 

 hundred known species at least seventy 

 per cent, of the males have yet to be found. 



— The Alumni Association of Jefferson 

 Medical College has inaugurated a move- 

 ment to secure, in some medical school, 

 the endowment of a memorial professor- 

 ship, to be designated the S. D. Gross 

 Professorship of Pathological Anatomy. 



' The profession at large, the personal 

 friends of the late Professor Gross, and 

 others interested in elevating the standard 

 of medical education, are cordially invited 

 by the undersigned to participate in this 

 graceful recognition of conduct and ser- 

 vices which have largely helped to estab- 

 lish the high standard of excellence to 

 which surgery has attained throughout 

 the United States, and served so much to 

 dignify the repute of American medicine.' 



Contributions may be sent to Dr. R. J. 

 Dunglison, treasurer, lock box 1274 Phil- 

 adelphia P. O., and will be acknowledged 

 in the columns of the Medical News of 

 Philadelphia. 



NOTICES OF BOOKS. 



The Course and Growth of the Fibro-vas- 

 cular Bundles in Palms. By John Cas- 

 per Branner, B. S. (Pamphlet, pp. 24.) 

 The substance of this pamphlet was 

 read before the American Philosophical 

 Society in October, last year. The author 

 begins with a reference to the unsatisfac- 

 tory character of the work of early bota- 

 nists relative to the peculiarities of endoge- 



nous growth, based upon the supposed 

 course of development of the fibro-vascu- 

 lar bundles of the palms. The difficulties 

 in the way of thorough investigation are 

 stated, and the literature of the subject 

 briefly reviewed. The theories of the 

 principal observers are concisely stated 

 and followed by the author's own obser- 

 vations, which have led to important con- 

 clusions. It is not possible to do justice 

 to this small but concisely written and 

 illustrated pamphlet, which is of great in- 

 terest to microscopists as well as botanists, 

 in this place. 



The subject is worthy of a careful re- 

 view, which will be prepared in future for 

 this Journal. 



Fibrine and Bacteria. By Thos. Taylor, 

 M. D., microscopist, Washington, D. 

 C. (Pamphlet, pp. 5.) 

 This is a reply to the statements of one 

 Dr. R. R. Gregg, whose observations upon 

 this subject have been severely criticised 

 by a writer in these columns. The sub- 

 ject is scarcely worthy the attention it has 

 received. 



Exchanges. 



Exchanges are inserted in this column without charge. 

 [They will be strictly limited to mounted objects, and 

 material for mounting.] 



Echinus spines of various species offered to any 

 person who will send in return three good sections 

 of the same. 



Box 630, Washington, D. C. 



Wanted — Diatoms on seaweeds and in muds, from 

 all the tropic seas. Offered a large quantity of fine 

 selected diatoms and other slides, or cash. 



J. C. RINNBOCK, 

 14 Simmering, Wien, Austria. 



Will exchange well mounted slides for others well 

 mounted. 



H. H. PEASE, 

 1271 Broadway, N. Y. 



Living red Astasia ncematodes {Euglena viridis) 

 and Volvox sent on application, or mounts of the same 

 in exchange for algae, fungi, or infusoria. 



J. M. ADAMS, 

 Watertown, N. Y. 



Material for mounting of all kinds wanted in ex- 

 change for other first-class unmounted objects in great 

 variety. 



M. A. BOOTH, 

 Long Meadow, Mass. 



Will exchange very thinly cut and well-stained his- 

 tological and pathological slides for other histological 

 and pathological slides. Will also exchange a limited 

 number of histological for other slides of various kinds. 

 H L. WHITNEY, M. D., 

 German Hospital, ^^irard ave. and 21st St., 

 Philadelphia, Pa. 



Will exchange good slides of micro-fungi, various 

 Diatoms in situ on algae, chemical crystals, and a fine 

 selection of stellate hairs on leaves of plants, for other 

 good slides. 



JAS. E. WHITNEY. 

 Rochester, N. Y. 



