M A G 
9 S 
variation of the magnetical compafs, and •thej 
inclination of the incllnatory needle ; as thej 
refult and conclufion of 38 years magneticalj 
ftudy - - Bond | 
A theory of the variation of the magnetical 
com pals - Halh y 
Account of the variation of the needle at Cabo 
Cors Caftle, on the coafl of Guiney Heathcott 
Repetition of the obfervations on the variation 
of the magnetic needle made at Norimbers 
feme years paft, in the prefent year 1685 
Velckamer , W urielbaur , and E 'mmart 
An account of the caufe of the change of the 
variation of the magnetical needle, with an 
hypothefis of the flru&ure of the internal parts 
of the earth - - Halley 
A demonftration of an error committed by 
common furveyors in comparing of lurveys 
taken at long intervals of time, arifing from 
the variation of the magnetic needle Molyneux 
Obfervations on the thermometer and magnetic 
needle in his vogage to the Cape of Good 
Hope 1700 - - Caning 
things relating to the magnet - It 
Obfervations upon the variation of the n< 
made in the Baltick in 1720. - Sand 
The variation of the magnetical compafs ob- 
of the Ladrones, with fome remarks thereon 
Rogers 
Obfervation of the variation on board th 
Royal African Pacquet in 1721 intheEthiopi 
Ocean - - Corn.wa , 
the latter part of the yeai 1722, and begin- 
ning of the year 1723 - Graban 
An account of an unufual agitation in th< 
magnetical needle, obferved to laft fome tim< 
in a voyage from Maryland - Hoxtoj 
Obfervations of the variations of the needh 
and weather, made in a voyage to Hud 
fon’s Bayini73i - Middle tv 
Tran f. 
VIII 6065 
Abridg. 
1 587 
XIII 208 
II 610 
XIV 578 
XV 1253 
— 609 
XVII 563 
— 615 
XIX 625 
1 125 
xxir 577 
: XXIII 1106 
IV 2 286 
XXXi 120 
; — 173 
VI 2 286 
! XXXII 53 
— - 289 
t 
: XXXIII 96 
290 
Ixxxvil 53. 
- 8° 4] 
- XXXVIII 
J 127 
1 ' - 
VIII 468 { 
1 t 
; 
p P 
Obfer; 
