139 



PKOCEEDINGS OF THE SOCIETY. 



MEETING 



Held on the 20th of December, 1899, at 20 Hanover Square, W., 

 The President, E. M. Nelson, Esq., in the Chair. 



The Minutes of the Meeting of November 15th last 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 

 Creighton, Chas . Researches on Glycogen. Part II. (Svo,) ,™ a .-, 



London, 1899) J 



Macbride, Thos. H., The North American Slime-moulds.) T1 p i 7 - j, 



( 8 vo, New York and London, 1899) j lue rummers - 



Quaintance, A. L., Some Important Insect Enemies, being! 



Bull. 45 of the State College of Agriculture and Mechanic} The Autlior. 



Arts, Georgia j 



Rio, Dr. Luis del, Elementos de Microbiologia. (8vo, Madrid,) ™, . ,, 



Festschrift zur Feier ihres fiinfzig-jahrigen Bestehens, her- 1 Die Physikalisch- 



aut-gegehen vou der Physikaliscli-Medizinischen Gesell-> Medizinische Gesell- 



scl i aft zu Wiirz burg. (4to, Wiirzburg, 1899) ) schaft zu Wiirzburg. 



A Gillett Substage Condenser with Adjustment The President. 



A Model of Reichcrt's New Fine-Adjustment Ditto. 



Two Slides of Salix Wallichiana Mr. Frank Gleadoto. 



Mr. Conrad Beck exhibited and described a new microtome made 

 for Prof. Delepine upon the principle of one which he had used for a 

 number of years, but which had never, he believed, been publicly shown. 

 The chief feature of this instrument was the extremely heavy knife- 

 carrier, made of solid metal which slid along the bed-plate on two 

 bearings, one being V-shaped and the other flat. It moved along these 

 quite freely, the weight and method of mounting preventing it from 

 easily getting off its bearings. This carried another piece of solid metal, 

 upon which the knife was clamped at any desired angle to the direction 

 of the movement. The thickness of the sections to be cut could be 

 regulated by means of a ratchet wheel, each tooth of which represented 

 2/x, at the bottom of the stand, and when set it worked automatically, 

 raising the object the given distance each time the knife-carrier was 



