C4»* 3 
-jwhen the Motion was fhort and quick, and eonfe- 
quently, a greater Difadvantage than if on the high 
Sea, where the Motion is grave, flow and regular, 
occasion'd by long Waves 3 but notwithstanding this 
quick Motion, the Obfervation made, exactly agreed 
with the Latitude of the Places as will more evi- 
dently appear by the Report hereunto annex'd, 
figned by all the Principal Officers that were then 
on board. 
H E new Improvement made by Mr. Charles 
Leigh to Davis s Quadrant, confiding of a Mer- 
curial Level, for taking the Sun or Stars Altitude at 
Sea, when the fenfible Horizon is obfcur'd either 
by thick and hazy Weather, or in fmooth Calms, 
when the Sky and Horizon are not diftinguifhablc, 
was tried on board this Ship, when the Latitude 
by Obfervation made with the faid Inftrument 
agrees, as appears by the following Calculations 5 
Sun's ZenithDift. 50 30 nZenithDiftance 50 38 
Sun's Declination ly S.f Declination 9N. 
Lat. by Obferv. 50 45 jLat. by Obferv. yo 47 
From which Experiment we judge this Inflru- 
ment fufficiently accurate for difcovering the Lati- 
tude, and removing that grand Impediment that 
viz. 
March the 9th, high Winds, 
and a quick Motion. 
a // 
March 10th, ditto 
Weather. 
fre- 
