[98] 



quadrant, to extend the ufe of this moft valuable 

 nautical inftrument, and to add to the exaclnefs 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 

 refpecl:, the propereft perfon to give an account of 

 them. 



I am, S I R, 



Your moll: obedient* 



humble fervanf, 



UndBD.Pdn.By ,5. p etef DoUond 



XV. Re. 



