A SERIES OF EXPERIMENTS 



ON THE 



QUANTITY OF FOOD, 

 Zaun f>^ a Vernon in %}tMf^, 



COMPARED WITH THE QUANTITY OF THE DIFFERENT 

 SECRETIONS DURING THE SAME PERIOD; 



WITH 



CHEMICAL REMARKS ON THE SEVERAL ARTICLES. 



BY JOHN DALTON, F. R. S. 



(Read Mareh Sib, 1830.) 



UURING my residence at Kendal, nearly 40 

 years ago, I had at one time an inclination to 

 the study of medicine, with a view to future 

 practice in the medical profession. It was on 

 this account chiefly, but partly from my own 

 personal interest in knowing the causes of disease 

 and of health, that I was prompted to make 

 such investigations into the animal economy as 

 my circumstances and situation at the time would 

 allow. I had met with some account of Sanc- 

 torius' weighing chair and of his finding the 

 quantity of insensible perspiration compared with 



