29: 



"Williams' Microtome adapted for Use with Ether as the 

 Freezing Agent. 



By J. W. Groves, F.R.M.S., Demonstrator of Physiology at 



King's College, London. 



{Read April 22, 1881.) 



Believing Williams' to be the best freezing microtome extant, it 

 occurred to me that its adaptation to the use of Ether as the freezing 

 agent would be an improvement, especially if the atomized Ether 

 after use could be condensed for use over again or be carried away 

 from the room in which the machine was in operation, so as to avoid 

 headache and the other disagreeable effects of the continued inhala- 

 tion of the Ether vapour. 



Therefore, having made a rough sketch embodying my ideas, I 

 took it to Mr. Swift, who has spent much time and trouble in 

 trying experiments to secure the best arrangement for the purpose, 

 which appears to be that shown in the sectional drawing (Fig. 1), 



Fig. 1. 



where D represents the wooden bowl of one of the old forms of 

 machine (for use with ice and salt), adapted to hold the Ether 

 JouRN. Q. M. C, No. 48. z 



