34 



Buchanan 



very feeble, but that the crossed-reflex effect manifested itself 20o- earlier 

 than before. The probable cord delay in the case of the same-side reflex 

 was still 227 (T (24-7(7— 2 0o-); in the case of the crossed reflex, it had been 

 at first 47'9or (54"5o- — 4"8cr— l"8cr), and was now about 28o-, the extra delay 

 in its case having been at first 25'2cr, then, after the dose (which was a 

 good deal strono-ei- than was usualh^ employed for a frog of such small size) 



Fig. 5. —Electrical responses of the gastrocnemius of a small frog 

 which, after being prepared and immediately before records 

 began to be taken, had been injected with 1 minim O'l per cent. 

 liquor strychniae (Exp. 33). 



A, first response obtained when the intact sciatic nerve of the same side 

 was excited. [Time lines 710 per second.] B, First response obtained 

 when the sciatic nerve of the opposite side was excited. [Time lines 

 700 per second.] 



had so taken efi^ect as to produce one of the best known symptoms of the 

 action of strychnine, becoming about Qcr. 



Before discussing the change which took place in the course of this 

 particular experiment, it will be well to consider what happened in other 

 preparations which were made either a longer time after the injection of a 

 very minute dose of the drug, or still early, but mth a more moderate dose 

 than in the second of the two experiments just referred to, and which 

 yielded crossed-reflex responses more frequently than only once or twice. 

 It is to thirteen of these that the following tables refer. 



