104 PROCEEDINGS OF SOCIETIKS, 



Mr. Hickie thought that FrustuUa Saxonica being found in 

 Saxony must be better known to Saxon people than others. There 

 really was no diftereuGe whatever between Bhomhoides and Saxonica, 

 but there was a very great difference between them and Crassinervis. 



The meeting then separated until February 2, when the anni- 

 versary will be held. 



Donations to the Library and Cabinet since December 1, 1875 : 



From 



Nature. Weekly The Editor.' 



Atheaseum. Weekly Ditto. 



Society of Arts Journal Society. 



The Microscope in Gynaecology. By A. Mead Edwards, M.D. Author. 



Popular Science Review. No.. 58 Editor. 



Transactions of the Linneau Society. Two parts Society. 



Two Slides of Aulacodiscus Kittoni Thomas Curties, Efsq. 



The following gentlemen were elected Fellows of the Society : — 

 The Rev. Thomas Wesley Freckelton ; William Brindley, Esq. ; 

 Charles William Hovenden, Esq. 



Waltee W. Reeves, 



Assist.-Secretary. 



Medical Microscopical Society. 



Dec. 17, 1875. — H. Power, Esq., Vice-President, in the chair. 



Dr. Pritchard exhibited in action the new freezing machine for 

 cutting microscopic sections, and which has already been described 

 in the 'Lancet' for December 11, 1875. The principle upon which 

 its action depends is that a block of copper cooled by immersion in 

 ice and salt will retain its low temperature sufficiently long in water 

 to enable sections to be cut from a small piece of any soft tissue 

 placed upon it, and which by contact with it has become frozen and 

 adherent to its surface. If first immersed in gum water the specimens 

 solidified better. 



In the discussion that followed, Mr. Ward suggested using a 

 metal plug in the same way as Dr. Pritchard recommended, only 

 dropping it into an ordinary microtome tiibe so as to obtain the addi- 

 tional advantage of a rest for the razor. 



Mr. Groves thought that if the plug were hollowed so as to contain 

 some ice and salt, it would remain cold much longer. 



Acari in Diabetic Urine. — Mr. Jabez Hogg showed a specimen of 

 urine from a case of incipient diabetes which contained large quan- 

 tities of the Acarus domesticMs, as well as particles of indigo. Twenty- 

 four hours after being voided he observed their presence, and up to 

 the present time they were still alive and breeding (for they were 

 seen in all stages of development) though six weeks had elapsed. 

 The mycelium of the diabetic fungus had appeared and the indigo 

 was increasing. It was possible that the animal fed on these two 

 substances. He had only examined this one specimen, and liad kept 

 it in the bottle in which it liad been sent to him, in the window 

 all the time. He had no doubt it was the ordinary sugar acarus, 

 and miist have obtained access to the urine in the fii'st instance 

 by accident. 



