104 PROCEEDINGS OF THE 



a screen by Mr. Ogilvy by means of the Epidiascope, and by 

 specimens of the deposits placed upon the table. 



The President said it was hardly necessary to ask them to- 

 give a hearty vote of thanks to Mr. Earland for reading them 

 such an interesting paper. A vote of thanks was carried by 

 acclamation. 



Through the kindness of Messrs. Leitz's London representative, 

 Mr. Ogilvy, the lecture was very efficiently illustrated by the 

 use of the Leitz universal projection apparatus, which projected 

 on the screen ordinary lantern -slides, plates and illustrations 

 from books, etc., single photographs, microscopic sections at 

 varying magnifications, rock hand-specimens and fossils. The 

 capabilities of the apparatus, which employs an automatic L-arc,. 

 taking 30 amp. at about 60 volts, were further demonstrated by 

 Mr. Ogilvy and his assistants after the meeting. The approxi- 

 mate candle-power produced is about 10,000. Micro-projection 

 may be accomplished in the usual horizontal position, and, for 

 hanging drop slides or other living preparations, a vertical 

 position is also possible. Besides the projection of lantern-slides 

 of any size up to 12 cm. square (4|in.), for which a novel and 

 exceedingly efficient holder is provided, it is also possible to 

 project larger transparencies up to 20 cm. square (8 in.), or such 

 preparations as brain sections, etc. 



The President said they were all very much indebted to Mr. 

 Ogilvy for what he had shown them ; he had himself been 

 greatly interested to see how perfectly the Epidiascope was 

 adapted for showing drawings, lantern-slides and microscopic 

 specimens on the screen in a manner which he had not previously 

 been aware of. 



The Hon. Secretary regretted to have to announce the recent 

 death of Dr. M. C. Cooke, M.A., LL.D., A.L.S., one of t he- 

 original founders of the Club, and President 1882-3. 



At the meeting of the Club held on November 26th, 1912, the 

 President, Prof. A. Dendy, D.Sc, F.R.S., in the chair, the 

 minutes of the meeting held on October 22nd were read and 

 confirmed. 



Messrs. E. Pitt, G. C. Bellamy, T. Tonkin, H. Pulford,. 

 E. H. Bassett, L. C. Hayward, William Hill, D. A. Mardon r 



