723 



PROCEEDINGS OF THE SOCIETY. 



MEETING 



Held on the 16th op October, 1901, at 20 Hanover Square, W., 

 W. Carruthers, Esq., F.R.S., President, in the Chair. 



The Minutes of the Meeting of June 19th, 1901, were read and 

 confirmed, and were signed by the President. 



The List of Donations to the Society since the last Meeting (ex- 

 clusive of exchanges and reprints) was read, and the thanks of the 

 Society were voted to the donors. 



From 

 Board of Agriculture, Annual Report of Proceedings under I Th R 7 , 



the Diseases of Animals Acts for the year 1900. (8vo,l , .,, °-> 



London, 1901) .. f Agriculture. 



Journal of the Board of Agriculture. Vol. viii. No. 2, Sept. I n ... 



1901. (8vo, London, 1901) } mUo : 



Chamberlain, Chas. J., Methods in Plant Histology. (8vo, l The University of 



Chicago, 1901) J Chicago Press. 



Pera^allo, H. and M., Les Diatome'es Marines de France. 1 m, r, ,,. , 



Ptii.(8vo, Paris, n.d. (1901?)) .. ..J The Publisher. 



Wilkinson, J. J., The Pharynx of the Eristalis Larval „,, . J7 



(Svo, Skipton, 1901) .. j ^ he Author. 



An old Microscope by Cary Mr. Chas. Lees Curties. 



Patent Graphic Telescope by Cornelius Varley .. .. Mr. Clias. F. Rousselet. 

 Mikroskopers Arms Mr. A. Flatters 



Mr. C. L. Curties, for Messrs. C. Baker, exhibited a Portable Micro- 

 scope made of magnalium. This alloy of manganese and aluminium, 

 which is as light as aluminium, is much easier to work, and takes a very 

 high polish. 



The Microscope was on the model of the " Diagnostic," originally 

 designed for Major Eon aid Ross's investigation of malaria. 



The weight of the Microscope is 14 oz. 



He also exhibited the " Engineering " Microscope, intended for the 

 examination of fractures and etchings on metal. A vertical illuminator 

 with diaphragms is provided ; and when the adjustments have been made 

 with this apparatus, focussing can be done by rack-and-pinion attached 

 to the stage, thus obviating the necessity of moving the body of the 

 Microscope. Levelling screws are supplied to the mechanical stage to 

 compensate for any want of parallelism between the faces of the blocks 

 of metal under examination. The instrument is also provided with the 

 usual diagonal rack coarse, and micrometer-screw fine adjustments, and 

 is mounted on a solid tripod stand, with bracket for support when in 

 horizontal position for photomicrographic work (see p. 697). 



The President said that the travelling Microscope was an ideal one, 



