Dr. Lathrop’s account of the springs and wells in Boston. 67 
which is expended in pushing along that portion of the water, which 
still keeps its original course). - Although the drawing is not perfect- 
ly correct, it may serve in some measure to illustrate the theory of 
springs, and the manner in which water is raised in them, 
On the preceding principles we easily account for the ebbing and 
flowing of the water in wells, near the sea, The pressure of the tide 
against the mouths ef the subterranean aqueducts will prevent. for a 
time the passage of the water ; of course the water will rise in the 
wells, which are supplied by those aqueducts, ‘When the tide falls, 
the water will fall in the wells, situated as now supposed, 
Thus does the Almighty ' #6 send springs into. the yallies, which 
* run among the hills : ‘they go. up by ‘the mountains, they go down 
# by the vallies, unto the place which is appointed for them.” 
With great consideration 
Jam 
your obedient ils servant, 
— ee ae eee won Pbtadat Ral 
Hon. Joux Davis, Esq. hee 
Pe 
