Mr. T. White's Ac county ^c, 377 



fo, men might from fuch fogs conjedure the 

 probability of a fucceeding hard winter, and of 

 the damage to be expeded by the breaking up 

 of frozen rivers in the fpring; and take fuch 

 meafures as arc pofiible and prafticable, to fecure 

 themfelves and efFedts from the mifchiefs that 

 attended the laft. 



Passy, May 1784. 



J Jhort Account of an Excursion through the 

 SUBTERRANEOUS Cavern at Faris. By Mr, 

 Thomas White, Member of the Royal Medical 

 Society of Edinburgh y &c. &c. in a Letter to 

 i?/j Father. Read February ^^ 1785. 



Paris, July 29, 1784. 



I 



V 



I YESTERDAY vifited a mofl: extraordinary 

 fubterraneous Cavern, commonly called the 

 Quarries. But before 1 give you the hiftory of 

 my expedition it will perhaps be neceffary to 

 fay a few words concerning the ohfervatoire royal, 

 the place of defcent into this very remarkable 

 cavern. This edifice is fituated in the Faux- 

 bourg St. Jacques, in the highefl: part of the ciry. 

 Jt takes its name from its ufe, and was built 

 by Louis XIV, in 1667, after the defign of 



Claude 



