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,{ for the ftone, than any one of them alone ; and 
*'* that if one of thefe remedies has failed of giving 
<f relief, the other ought to be tried : for as the 
" above white calculus , which yielded a little to the 
<c folution of foap, refilled lime-water ; fo there may 
“ perhaps be others, that are readily diffolved by 
“ lime-water, but little affedted by foap. 
“ Dr. Springsfeld’s experiments with lime-water 
“ are fomehow not juft j for in feveral calculi I 
“ have found the diflolving power of oyfterfhell 
“ lime-water above eight times greater than he 
“ makes it.” 
Some Obfervaiions on the lithontriptic Virtue 
of the Carl (bad IV aters , Lime-water y and 
Soap : In a Letter to Dr. John Pringle, 
F. R . S. from Dr. Robert Why tt, F. R. S. 
and Profeffor of Medicine in the Umverfty 
of Edinburgh. 
S I R, 
Read Dec. 15. T^ROM tire experiments related in Dr. 
Springsfeld’s Commcntatio de prczro- 
gativa thermarum Carolinarum , &c. which you were 
fo good as to fend me fome time ago, it appears,, 
that thefe waters are not only poflefied of a very ex- 
traordinary power of difiolving the ftone, but that 
in this refpedt they greatly exceed lime-water. 
(A) Thus, Dr. Springsfeld having infufed, for 14 
Days, in a heat of 96 degrees of Fahrenheit’s fcale, 
three pieces of the fame calculus , each weighing 30 
5 grains,. 
