680 
PROFESSOR H N. MARTIN ON THE INFLUENCE OF VARIATIONS 
The results of Experiment I. are represented graphically on Plate 49. Each division 
along the abscissa corresponds to two minutes of time. The level of the abscissa line 
answers to a temperature of 25° C. and to a pulse-rate of 60 per minute. The 
continuous curve represents the pulse variations during the experiment. Each division 
on the height of ordinates drawn from any point of the pulse curve to the abscissa 
answers to ten pulse beats more than 60 per minute. The dotted curve represents 
the temperature variations. Each division of height in ordinates drawn from it to 
the abscissa represents one degree centigrade above 25°. It will be observed that the 
curves of temperature and pulse-rate fall and rise together throughout the experiment. 
Experiment IT. 
April 27, 1882. — The Dog weighed 5550 grms. Chloroform and ether administered 
during the operation of isolating the heart. Venous pressure that exerted by 
a column of defibrinated Calf’s blood 15 centims. in height. All the systemic 
vessels but those supplying the heart itself were ligated at 3 1 ’ 10 in p.m. The animal 
was transferred to the warm chamber at 3 h 15 ra P.M., and then decapitated and a stout 
wire run down the spinal canal as far as the lumbar region before any observations as 
to pulse-rate were made. 
