COM 
II 4r 
needle,, in the Atlanticle and Ethiopick Oceans, 
1706 - - Maxwell 
Some remarks on the variations of the magne- 
tical compafs, publi/hed in the Memoirs of 
the Academy of Sciences, with regard to the 
general chart of thofe variations made by E. 
Hadley ; as alfo concerning the longitude of 
the Magellan Streights - Halley 
The variation of the magnetical compafs ob- 
ferved in a paffage from Cape St. Lucar, in 
California, to the Me of Guan, or Guana, on- 
of the Ladrones ; with feme remarks thereon 
- Rogers 
A new and exadl table, colledled from feveral 
obfervations taken in four voyages to Hudfon’s 
Bay from London : /hewing the variation of 
the magnetical needle, or fea compafs, in the 
pathway to the faid bay, according to the fe- 
veral longitudes and latitudes, from 1721 to 
2725 - - Middleton 
A new and exadt table colledled from feveral 
obfervations taken from the year 1721 to 1729, 
in nine voyages to Hudfon’s Bay, in North 
America : (hewing the variation of the com- 
pafs, according to the latitudes and longitudes, 
accounting the longitude from the meridian of 
London - - Middleton 
The ufe of a new azimuth-compafs for finding 
the variation of the compafs, or magnetic 
needle, at fea, with greater eafe and exadlnefs 
than by any yet contrived for that purpofe 
Middleton 
A letter fhewing, that the eledlricity of glafs 
difturbs the mariner’s compafs, and alfo nice 
balances - - Robins 
On the effedls of lightening in deftroying the 
polarity of the mariner’s compafs; to which 
are fubjoined, fome remarks by Go win Knight 
- Waddell 
A defeription of a mariner’s compafs contrived 
by Gowin Knight 
An account of fome improvements of the ma- 
riner’s compafs, in order to render the card 
and needle propofed by Dr. Knight of general 
ufe - - Smeaton 
The variation of the compafs ; containing 1719 
obfervations to, in, and from, the Eaft Indies, 
1 
Tranf. 
XXV 2433 
XXIX 165 
XXXI 173 
XXXIV 73 
XXXVII 71 
XL 39s 
XL1V 242 
XLVI in 
— 5°5 
— 5*3 
Abridg. 
IV 453 
VI 2 286 
297 
— - 300 
VIII 374 
X 328 
X 695 
— 689 
— 693 
Guinea.,, 
