ETHER,, ETHYL CHLORIDE 



59 



right in the illustration), and by help of the thread the 

 sciatic nerve is drawn through the holes in the gas chamber 

 and across the two needle electrodes which are connected to 

 an induction coil arranged for single shocks. (See Fig. 1.) 

 By means of a rubber tube, one of the side tubes of an ether 

 bottle is now connected with one of the tubes leading into 

 the gas chamber. The boot electrodes (which have been 



Hand bellows . 



respiration 

 machine 



Fig. 53. Ether bottles showing method of administering air and ether (chloroform) 

 to an animal with the chest open, or for passing ether (chloroform) vapor through the gas 

 chamber. 



soaked in salt solution and now have been filled with zinc 

 sulphate solution) may be placed just to the right of the gas 

 chamber and the end of the sciatic nerve is laid across the 

 tips of the boots. Keep the nerve and muscle moist with 

 normal salt solution. The boot electrodes are also arranged 

 so that single shocks may be sent through them when de- 



