384 



PROCEEDINGS OF THE SOCIETY. 



MEETING 



Held on the 16th of April, 1902, at 20 Hanover Square, W. 

 Dr. Henry Woodward, F.E.S., President, in the Chair. 



The Minutes of the Meeting of 19th of March, 1902, 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 were voted to the donors. 



From 

 Miquel & Cambier, Traite de Bacteriologie. (8vo, Paris, 1902).. The Publisher. 



Parkinson, S., A Treatise on Optics. (8vo, London, 1859) .. Mr. E. M. Nelson. 

 Quarterly Journal of Microscopical Science and Transactions of\ -, T v -, , r , 



the Microscopical Society. Vol. iii. (8vo, London, 1855) ../ Mr. jl. m. xeUon. 

 Bird, Dr. Golding, Urinary Deposits. (8vo, London, 1857) .. The Publishers. 

 A " Lenticular Microscope " Mr. J. Pillischer. 



The President, in reference to the old Microscope by Pillischer 

 presented to the Society, regretted the absence of Mr. Nelson, who had 

 intended to say something about it. It appeared to be a most compact 

 little instrument, and most complete, in its way, for the examination of 

 urinary deposits, &c. by a medical man. 



Dr. Golding Bird's description of it was then read by Dr. Hebb, as 

 follows : — 



" It has often been a matter of regret that a very portable Micro- 

 scope has not hitherto been contrived, sufficiently small to be easilv 

 carried in the pocket, and sufficiently economical to be within the reach 

 of all. Very recently Mr. Pillischer has constructed one, which he 

 terms the " Lenticular Microscope," which seems to me to fulfil this 

 condition entirely, and I cannot too strongly recommend it to the notice 

 of the profession. In the coustruction of this beautiful little instru- 

 ment he has made use of the excellent and well-known Coddington lens, 

 which consists of a very thick double-convex lens, excavated at the sides 

 into a kind of dumb-bell shape, by which the extreme lateral rays are 

 cut off, and a very perfect image obtained. 



" It consists of a rectangular piece of brass, excavated at one end, 

 furnished with raised sides. To the inner surface of the side a steel 

 spring is fixed, for the purpose of keeping the piece of glass on which 

 the object is placed quite steady. At the under surface a brass arm is 

 fixed bearing a small concave mirror. A perforated diaphragm is fixed 

 to a pin beneath an aperture in the plate, so that by moving it the 

 pencil of rays reflected from the mirror may be lessened, and a clearer 

 definition obtained. A strong arm of brass is capable of being moved 

 horizontally over the aperture in the plate, whilst a fine screw movement 

 enables it to be raised vertically. The lenses, having respectively a 



