4 
philosophical 
TRANSACTIONS- 
I. An Account of an artificial Spring of Heater, By Erafimus 
Darwin, M* D . F. R. S. 
ONFIDENT that every atom which may contribute to 
increafethe treafury of ufeful knowledge, which you are 
fo fuccefsfully endeavouring to accumulate, will be agreeable 
and interefting to the Society, I fend you an account of an 
artificial fpring of water, which I produced laft fummer near 
the fide of the river Darwent in Derby. 
Read November 4, 1784. 
To the Prefident and Fellows of the Royal Society* 
gentlemen 
Derby, July 16, 17S4. 
Yol.LXXV, 
B 
Near 
