[ 282 ] 
Carollbadt water, as fuperior to lime-water, in dif- 
folving ftones out of the body, if confirmed by cor- 
refpondent events in the internal ufe, would be a dis- 
covery of the greateft moment, and highly deferves 
to be profecuted. 
I fliall only obferve here, that the principal mine- 
rals impregnating it are a native alcaline fait, and a- 
calcarious earth ; and that the Aix la Chapelle waters 
are not without fuch a fait and earth alfo, and, which 
is of more moment, they are reported, by long tak- 
ing, to render the urine alcaline, even as do the Ca~ 
rolfbadt waters j and we are alfo told, that calculi, 
macerated twenty-four hours in the water of Aix la 
Chapelle, have been reduced to a fand, or foft con- 
fiftence : but how far this laft, the Selters, the Bourne 
waters, or our Tilbury water, or others alike impreg- 
nated, may participate of a like virtue, mull be de- 
termined by further obfervation and experience. 
Dublin, the 24th 3d mo. 1759. 
XXIX. An Account of the EffeSts of a 
Storm of I bunder and Lightning at Kick- 
manfworth, in Hertford (hire, on the 16 th 
of Inly, 1 7 5 9 : In a Letter from Mrs . 
Anne Whitfeld. Communicated by Mr. 
John Van Rixtel, F. R. S. 
S I R, 
Rickmerfworth, Q&. 22. 1759. 
Read Nov. 15, 
1 7 59 * 
Y fon not being at home, I have 
taken upon me to comply with 
your requefl, in giving you an account of the damages 
we 
