N° III. 
OBSERVATIONS DURING THE SEASON OF NAVIGATION IN 1819. 
By these observations, the ships’ track has been laid down, and the 
latitude and longitude of all lands determined, which are comprehended 
in the chart of the discoveries of the Hecla and Griper. 
The initials, in the column denoting the observer, are those of Captain 
Parry, Lieutenant Beechey, Mr. Hooper, and of Captain Sabine. 
The observed altitudes are corrected for index error only. The letters and 
signs which are annexed, signify as is usual, L and U altitudes of the lower 
or upper limb by the natural horizon ; o Q altitudes of the upper and 
lower limbs, and of the centre, by an artificial horizon. 
The latitude at other hours than at noon, except where it is expressly 
mentioned otherwise, is deduced by the ships’ log, from the nearest obser- 
vation, or from a mean of the two to which it is intermediate. The longitudes 
at noon are obtained in like manner. 
The authority, on which the correction of the chronometer No. 228 to mean 
Greenwich time is founded, is shewn in the memorandum annexed to the 
Lunar Observations of June and August, 1819. 
The longitude by 228 is the result of the elements contained in the table ; 
the corresponding longitude by the mean 6f the six chronometers, selected 
for final determination, occupies the last column, and may be examined by 
means of the table which follows the Abstract of Observations in 1819. 
