228 PROCEEDINGS OF THE SOCIETY 



MEETING 



Held on the 18th March, 1914, at 20 Hanover Square, W., 

 Mr. E. Heron-Allen, F.L.S., etc., Vice-President, in the 

 Chair. 



The Minutes of the Meeting' of February 18, 1914, were read and 

 confirmed, and were signed by the Chairman. 



The List of Donations (exclusive of exchanges and reprints) re- 

 ceived since the last Meeting was read as follows :— 



From 



Prof. Sigmund's Histological Preparations. Part 7, with text Messrs. Carl Zeiss. 

 Leiss (C.) Die optischen Instrumente, 1899 Sir Frank Crisp. 



The Chairman said that Messrs. Zeiss's presentation of Part 7 of 

 Professor Sigmund's preparations - the other parts of which the Society 

 already possessed— formed a very valuable contribution to their Cabinet, 

 and that Leiss's book, " Die optischen Instrumente," also formed an 

 interesting and important asset to the Library, especially from an 

 historical point of view in the cataloguing of microscopical and other 

 instruments. He was sure that it would be the wish of the Society that 

 their cordial thanks be accorded to the donors of these two gifts. 



Mr. C. F. Ptousseiet described a very curious old French Micro- 

 scope which the Society had just acquired, viz. one of the instruments 

 invented by L. Joblot/Professor at the Royal Academy of Painting and 

 Sculpture in Paris, and described in his book, " Descriptions et usages 

 de plusieurs nouveaux Microscopes." published in Paris in 1718. It 

 was richly engraved with ornate design and was made by I. Langlois, a 

 pupil of the "Sieur" Butterfield, both well known as astronomical, 

 quadrant, sundial, and other scientific instrument makers at this period 

 in Paris. The object-glasses consisted of single bi-convex lenses, 

 mounted between two brass plates in the manner of Loeuwenhoek's 

 Microscopes. The instrument possessed a screw-focusing arrangement, 

 and a barrel-shaped diaphragm, lined with black velvet inside, with 

 perforated cap at each end, which effectually excluded all but central 

 light for the illumination of the objects. It was proposed to publish a 

 full description with illustrations of this interesting old Microscope in 

 the next Journal. 



The Chairman pointed out that this communication was peculiarly 

 apposite after the demonstration of one of Loeuwenhoek's Microscopes 



