[ 220 ] “ 
Tlicfe obfervatlons, which are only propofed as 
hints to thofe who have more leifure for experimental 
enquiries, you will be fo obliging as to commu- 
nicate to the Royal Society, or not,, as you think: 
proper. I am, 
Dear Sir, 
Your mod; faithful’ 
and obedient lervant. 
. R» Watfon« 
I 
XX ni, ^ 
