[ 98 ] 
quadrant, to extend the ufe of this moft valuable 
nautical inftrument, and to add to the exadtnefs of 
the celeftial obfervations taken with it to determine 
the longitude at fea. But of thefe particulars I need 
fay no more, fince you are, without doubt, in every 
refpeft, the propereft perfon to give an account of 
them. 
I am, SIR, 
Your moft obedient, 
humble fervant, 
london, February 2 S , Peter DollontL 
* 77 ** * 
/ 
XV. 
