24 



J. WILLIAM BUCHANAN 



Oxygen consumption. Eight experiments were carried out on 

 the effect of ether sokitions on the rate of oxygen consumption 

 of the pieces for some hours after section. The high and low 

 extreme results are given in table 3B. All other results fall 

 between these two extremes, and no comment is necessary except 

 to point out that such solutions of ether obviously prevent to a 

 greater or less degree the stimulation of section. 



TABLE 3B 

 Oxygen consumption — ether 



Chloral hydrate 



Head frequency. Table 4A gives the extreme high and low 

 results obtained with chloral hydrate. Five experiments were 

 done. The number of experiments is too small to warrant any 

 conclusions other than that the head frequency is increased in 

 C pieces and shghtly decreased in A pieces by exposure to cer- 

 tain concentrations of chloral hydrate — conclusions which serve 

 to extend to chloral hydrate the capacity to affect head fre- 

 quency in the same directions as chloretone, chloroform, and 

 ether. 



Oxygen consumption. Table 4B gives the extreme high and 

 low results obtained in measuring the rate of oxygen consump- 

 tion of pieces exposed to such concentrations of chloral hydrate. 

 Fifteen experiments Were carried out. It is necessary only to 

 state that in every case the chloral-hydrate solutions prevented 



