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PROCEEDINGS OF THE SOCIETY. 



Meeting of 11th Apkil, 1883, at King's College, Stband, W.C, 

 Chas. Stewart, Esq., M.E.C.S., F.L.S. (Vice-President), in the 

 Chair. 



The Minutes of the meetiBg of 14th March last were read and 

 confii'med, and were signed by the Chairman. 



The List of Donations (exclusive of exchanges and reprints) 

 received since the last meeting was submitted, and the thanks of the 

 Society given to the donors. 



From 

 Gerard, J.— A Catalogue of Plants (1596). Edited, with 



notes, &c., and a life of the author, by B. D. Jackson. 



xvi., v., and 64 pp. (Privately printed. 4to, London, 



1876.) 

 Lamouroux, J. V. F. — Histoire des Polypiers Coralligenes 



flexibles, vulgairement nomme's Zoophytes. Ixxxiv. and 



559 pp. 19 pis. (8vo, Caen, 1816.) 

 Turner, W. — Libellus de re herbaria novus (1538). Re- 

 printed in facsimile, with notes, &c., and a life of the 



author, by B. D. Jackson, xii., xviii., 20, and 8 pp. 



(Privately printed. 4to, London, 1877) Mr. Crisp. 



Spallanzani, L. — Tracts on the Natural History of Animals 



and Vegetables. Translated by J. G. Dalyell. 2nd ed. 



2 vols. (8vo, Edinburgh, 1803) Mr. G.J. Smith. 



24 Slides of Diatomacese and Fresh- water Sponges .. .. Mr. B. W. Thomas, 

 Desiccated Rotifers Eev. E. J. Holloway. 



Mr. Crisp exhibited and described Bertrand's, Fuess's, and Nachet's 

 Petrological Microscopes ; also Eollett's Polari-Spectro-Microscope. 



Dr. Maddox exhibited and described a double aeroscope, with 

 small aspirator for the collection of germ cells from the atmosphere. 

 A diagram of the apparatus was also shown in illustration of the con- 

 struction and connections of the various parts {supra, p. 338). 



The Chairman was sure the Fellows would feel greatly obliged to 

 Dr. Maddox for bringing this interesting instrument and showing it 

 to them in action, and thought the instrument would undoubtedly be 

 very useful if extensively used for the examination of atmospheric 

 germs in hospitals or places where infection was suspected. 



Mr. Crisp called attention to the views of MM. Prinz and Van 

 Ermengem as to the markings of diatoms [supra, p. 411), and to the 

 paper by Dr. Hogg on the movements of diatoms {ante, p. 262). 



Mr. Michael said it would be interesting to know how these 

 Bections were obtained, whether by grinding or by any other means. 



