CONTENTS. vii 
Secretary of the Imperial Academy of Peterfburgh y 
in a Letter to Charles Morton, M. D. Sec. R. S. 
& Acad. Imper. Petroburg. &c. Soc. p. 69 
X. A Letter to the Rev. Mr. Mafkelyne, AJlronotner 
Royal , F. R. S. accompanying a new Chart of the 
Red Sea, with two Draughts of the Roads of Mocha 
and Judd a, and feveral Obfervations made during a 
Voyage on that Sea , by Capt. Charles Newland. 
P- 77 
XI. Remarks and Obfervations made on board the Ship 
Kelfall, on a Voyage to Judda and Mocha, in 1769, 
by the fame. p. 79 
XII. An eafy Method to difill frejh Water from Salt 
Wafer at Sea y by the fame. p. 90 
XIII. Obfervations on the milky Appearance of Jome 
Spots of Water in the Seay by the fame. p. 93 
XIV. A Letter from Mr. Peter Dollond, to Nevii 
Mafkelyne, F. R. S. and Aftronomer Royaly de- 
ferring fome Additions and Alterations made to 
Hadley's Quadrant, to render it more ferviceable at 
Sea. p. o ^ 
XV. Remarks on the Hadley’s Quadrant, tending 
principally to remove the Difficulties which have . 
hitherto attended the JJJ'e of the Bach-obfervation , 
and to obviate the Errors that might arife from a 
Want of farallelifn in the two Surfaces of the 
Index-Glafs. By Nevii Mafkelyne, F R. S. Affro- 
nomer Royal. P -99 
* XV. Account of the Irruption of Solway M©fs on 
December 16, 1772 ; in a Letter from Mr. John 
Walker, to the Earl of Bute, and communicated by 
his Lordjhip to the Royal Society. p. 123 
1 ’ 
XVI. A 
