117 



PROCEEDINGS OF THE SOCIETY. 



MEETING 



Hbld on the 20th of Decembee, 1905, at 20 Hanover Square, W. 

 Dr. D. H. Scott, F.R.S., etc., President, in the Chair. 



The Minutes of the Meeting of the 15th of November, 1905, were 

 read and confirmed, and were signed by the President. 



The List of Donations to the Society (exclusive of exchanges and 

 reprints) received since the last Meeting, was read, and the thanks of the 

 Society voted to the donors. 



From 



Chamberlain, Chas. J. Methods in Plant Histology.) mi . ., 



2nd edition. (Chicago, 1905) . . . . J The Author. 



Coles, Alfred C. Clinical Diagnostic Bacteriology. (8vo.) m , „ ,,. , 



London, 1904) . . . . . . l .} The Polishers. 



Farlow, Wm. G. Bibliographical Index of North Ameri-) rpi . .. 



can Fungi. Vol. i., part 1. (Washington, D.C., 1905) . / ine Autlwr - 



Kerr, Richard. Nature through Microscope and Camera.) m7 „ ,,. 7 



(8vo, London, 1905) . . . . . . .) The Publishers. 



Pantocsek, Josef. Beitrage zur Kenntniss der Fossilenl m , . ., 



Bacillarien Ungarns, III. Theile. (8vo, Pozsony, 1905) f lfie Autnor - 



Slides mounted by Andrew Pritchard .... Mr. N. D. F. Pearce. 



Smith, Erwin F. Bacteria in Relation to Plant Diseases.) Carnegie Institution 



Vol. i. (Washington, D.C., 1905) . . . . J of Washington. 



The President called attention to a donation of slides prepared 

 about fifty years ago by the late Mr. Andrew Pritchard. These had been 

 presented to the Society by Mr. N. D. F. Pearce, and were exhibited 

 under Microscopes in the room. 



Mr. J. Rheinberg called attention to an exhibit consisting of a fine 

 series of about twenty photographs of diatoms taken with the Zeiss 

 apparatus for photomicrography with ultra-violet light. They had been 

 given to him by the designer of the apparatus, Dr. August Kohler of 

 Jena, and were of peculiar interest as being one of the first series of 

 diatoms which Dr. Kohler had taken. 



After referring to the arrangement for photomicrography with ultra- 

 violet light,* and the great increase in resolving power consequent on 

 being able to utilise light having a wave-length of 275 fj.fi, f Mr. 

 Rheinberg mentioned that he had heard that the first experimental 

 photographs were taken about the year 1900 with objectives made from 

 quartz and fluor-spar. Now the objectives and other lenses were made 



* See this Journal, Aug. 1905, pp. 513-18. 

 t 1 nfi = one millionth of a millimetre. 



