Influence of Milk upon Tetany in Salamander Larvae. 51 



Amount of COi 



Expressed in c.c. Direction of Change 

 Character of Operative per c.c. of Blood in Total CO2 of 



Procedure. Plasma. the Blood. 





,490 





Two vertebrate and one carotid oc- 







cluded. Blood pressure from other 









•525 





One carotid released 



.48S 





occluded 



.460 



Fall. 





,480 



Rise. 



occluded 



•435 



Fall. 



released 



.460 



Rise. 



occluded 



•445 



Fall. 



released 



■447 



44 per cent, of total volume of blood 







drawn up to this time. 



" occluded 



.380 



Rapid fall. 



released 



•350 



Slow fall. 





•3ii 



Rapid fall. 



'I " released 



•247 



Rapid fall. 





.247 



Animal died. 



alone, after forty per cent, of the blood has been drawn will give a 

 similar fall in the carbon dioxide of each successive sample of 

 blood without occlusion of the remaining carotid artery. 



31 (1406) 



The influence of milk upon tetany in Salamander larvss. 

 By Eduard Uhlenhuth 



[From the Rockefeller Institute for Medical Research, New York.] 



As reported in the meeting of the Society held on November 

 15, 1918, calcium lactate as well as magnesium lactate suppresses 

 the tetanic convulsions of thymus-fed tetanic larvae of salamanders. 

 Since it has been claimed that milk also has this effect, it was 

 interesting to test its action on tetanic larvae. 



Curves are demonstrated which show the percentage of tetanic 

 individuals among two series of thymus-fed larvae of the salaman- 

 der, Ambly stoma opacum. The animals of one series were kept in 

 a weak milk solution, those of the other series which served as 

 controls were kept in tap water. It is evident from the curves 

 that milk was extremely effective in suppressing the tetanic con- 



