Molecular Weight and Physiological Action. | 195 
GROUP 7. 
*Chlorhydric acid, 0°46) Impede systemic and pulmonary circu- 
wyoanyaric acid, o. 2... 2 0°62 lation. Increase the irritability of 
mic acid, 0°75 the heart (ventricles). Kill by arrest- 
Todic acid, 1:00 ing the respiration. 
Group 8. 
Phosphoric acid, 4:00 ) No well marked physiological effects 
ee WN os cr 4:00 in large quantities. Kill by arresting 
Antimony tartrate, _......._..... 2°70 pulmonary circulation. 
Group 9. 
Sulphuric acid, 1°7 ) Impede pulmonary circulation. Act on 
Selenic acid, _ 14 the nervous system. 
A simple inspection of the above tablet will suffice to show 
the facts which have led me to submit these remarks to the 
tion made by Dr. Rabuteau to the Academie des Sciences in 1869, 
* Injected into the arteries. ae 
+ The numbers contained in the above table can but be approximative, as must 
i i in properties, as living 
be the case in operati a substance uch un P 
matter subject to variations which in the present of science we are unable 
= . e€ mann e experiments were performed was not 
culated to furnish accurate data as e smallest quantity of the different sub- 
stances that would destroy life. After one or two imi e nts to 
ascertain the general physiological action of a substance, and the quantities in 
Which it could be used, ents recorded 
into the veins or arte in quantities sufficient to produce the physio- 
logical effects, but not so as to until three or four in; 
made. It j the e ts recorded 
that have furnished the numbers in the table, reduced, however, to the same 
Weight of animal (for dogs 7 kilo., for rabbits 1-4 kilo. ; rabbits were only used in 
the first group. As the riments v 1 Spa eS om ner, the num- 
bers thus obtained are fairly comparable.) 
