DR THOMAS R. FRASER ON STROPHANTHUS HISPIDUS. 



437 



Experiment CXLIV. — Normal saline followed by solution of digitalin in saline, 

 1 : 50,000 (Plate XX.). 



Time in 



Flow per Min. in 



Time in 



Flow per Min. in 



Time in 



Flow per Min. in 



Minutes. 



Cub. Cent. 



Minutes. 



Cub. Cent. 



Minutes. 



Cut. Cent. 



1 



305 ~ 





17 



31 * 





31 



2-0 





2 



2-9 





18 



31 





32 



1-8 





3 



2-8 





19 



3-1 





33 



1-5 





4 



3-0 





20 



3-15 





34 



1-2 





5 



31 





21 



3-15 



35 



0-8 





6 



3-2 





22 



31 



m 



36 



0-8 





7 



3-2 





23 



31 





37 



0-6 



fd 



8 

 9 



3-2 

 3-1 



CD 



24 3-2 

 Digitalin solution 





38 

 39 



0-5 

 0-5 



'5b 



10 



3-2 



CD 



turned on. 



40 



0-35 



Q 



11 



3-15 





25 



3-1 1 





41 



0-35 





12 



3-2 





26 



3-0 





42 



0-3 





13 



3-25 





27 



3 



•^ 



43 



0-3 





14 



3 2 





28 



2-7 





44 



0-3 





15 



3-2 





29 



2-2 



auo 



3 



45 



0-25 





16 



3-1 J 





30 



2-2 j 



46 



0-25 J 





Considerable oedema occurred in this experiment. The weight of the frog was 407 

 grains before and 514 grains after it ; the gain of weight being, therefore, 107 grains. 



After normal saline had passed for 24 min. without any effect, 1 : 50,000 solution of 

 digitalin contracted the blood-vessels to one-half in 9 min., and to one-fourteenth in 

 20 min. 



Experiment CXLV. — Normal saline followed by solution of digitalin in saline, 

 1:20,000 (Plate XIX.). 



Time in 



Flow per Min. 



Time in 



Flow per Min. 



Time in 



Flow per Min. 



Minutes. 



in Minims. 



Minutes. 



in Minims. 



Minutes. 



in Minims. 



1 



37] 





10 



43 | 





21 



1-5 ' 





2 



37 





11 



28 





22 



1-5 





3 



39 





12 



17 





23 



1-5 





4 



42 



<i5 



13 



12 





24 







5 



42 



!>! 



14 



8 



.3 



25 





d 



6 



7 

 8 



42 

 43 

 43 



S3 



15 

 16 

 17 



3 



2 

 2 



i <8 



be 



s 



26 



27 

 28 



Only 

 3 



60 



s 



9 

 Digita 



44 J 

 in solution 





18 

 19 



2 

 2 





29 

 30 



9 min. 





turned on. 



20 



1-5 





31 















32 



- 





No oedema occurred, as at the end of the experiment the weight of the frog was the 

 same as before the experiment, viz., 478*3 grains. After slight dilatation had been pro- 

 duced in the blood-vessels by normal saline, passed through them for only 9 min., this 

 solution of digitalin immediately produced contraction, and with such rapidity that the 



