on the IJland of Minorca. 443 
being owing, as is believed, to the vapours arifing from 
thefe gardens; for houfes fituated on the South-fide of 
the town, though at a little diftance, are by much the 
more healthy, though more expofed to the heat of the 
meridian Sun. Other inftances might be quoted; and 
experience has taught us, that it is found to be very pre- 
judicial to health to remain expofed to the evening dews 
near Mahon or St. Philips, round which thele gardens 
chiefly abound, while country peafants lie in their vine- 
yards whole nights without being hurt, the vines being 
left to nature for a lupply of moifture. 
Perhaps it may feem, that, while the heat and drought 
of the climate makes this method ot gardening neceffary, 
and at the fame time require a large fupply of fucculent 
vegetables and fruits, thefe ill conlequences muft be un- 
avoidable. But M. D£ ch ate au-vieux, a magiflrate of 
Geneva, has pointed out a very promillng remedy, fug- 
gefted to him by fome of his own judicious experiments 
in agriculture. 
The fecond general caufe of tertians was pointed out 
to me by Dr. munro, phylician of this ifland, an inge- 
nious gentleman, and very obfervant of every thing re- 
lating to his profeflion. 
The rocks of this ifland confift chiefly of two kinds 
of flone ; one fo hard that fcarce any tool can touch it; 
and the other fo foft, that it is eafily cut into any form. 
It much relembles the Bath flone, and is called Cantoon 
flone. The firft is impervious to any fluid ; but the other 
fucks up, or is penetrated by, moifture, like filtering 
Vol. LXVI. Nnn ftones. 
