( 44 ® ) 
which three Things muft be brought to meet, in a 
general way requires*: I fay, confidering this, and the 
vaft Importance of fuchDifpatch, in the Cafe of great 
Altitudes, or of tempeftuous Seas, or beclouded 
Skies, tis prefumed the Inftrument thus made will 
be judged preferable to all others of the kind yet 
known. Some Mailers of Veffels, who fail from 
hence to the Wejl-Indies , have got of them made as 
well as they can be done here ^ and have found fo 
great an Advantage in the Facility and in the ready 
Ufe of them, in thofe Southerly Latitudes, that they 
rejed all others. And it can fcarce be doubted, but 
when the Inftrument becomes more generally known, 
it may upon the R oyal Society's Approbation, if the 
Thing appear worthy of it, more univerfally obtain 
in Pradice. 
’Pis now four Years fince tfho. Godfrey hit on this 
Improvement ; for his Account of it, laid before the 
Society laft Winter, in which he mentions two Years* 
was wrote in 1752. And in the fame Year, 1730, 
after he was fatisfied in this, he applied himfelf to 
think of the other, viz. the refieding Inftrument 
by Speculums, for a help in the Cafe of Longitude, 
though ’tis alfo ufeful in taking Altitudes, and: one 
of thefe, as has been abundantly proved by the Maker, 
and thofe who had it with them, was taken to Sea* 
and there ufed in obferving the Latitude, the Win- 
ter of that Year, and brought back again hither before 
the End of February , 1737, and was in my keeping 
for forne Months immediately after. It was unhappy 
indeed, that having it in my Power, feeing he had 
no Acquaintance nor Knowledge of Perfons there, that 
I tranfmitted not an Account of it fooner; But .1 
had 
