AN ABSrRACl of OBSERVATIONS on the DIP of the HORIZON at SEA, made in His Majesty’s Ship Hecia, in 1820 , 
with Dr. Wollaston’s Dip Sector. 
ON THE DIP OF THE HORIZON AT SEA. 
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Ihe Tabular Dip is taken from Mendoza Rios. The Observers were Captain Parry, Lieutenant Beechey, Mr. Ross, and Captain Sabine. 
