Hotbode d^observer 1a variation de raiguitie aimantee en mer.
Ibid. A.I734. Mem. p.59Qr ' Ed. Oct. A.1734. Mem. p.SOI.
Jean Henri vaw SwniDBtf,

Hecherchea aur les aiguilles aimanieea ei aor leura variationa regulier€f«
M«ni« de M^tbemat. et de Phya. T. g. p. I.
; • • LB MONNIBB, . '

ILechercbea sur ies variations horizontalea de l'aimant«
Mem^ de Paria. A. 177^% F. U Mtml p. 157.
# ♦ •

John yfhUM,

Letter concerning Captain Edmund Hallev*6 map oF magneticlc varia«r
tiooa; and some other things relating to ihe magnet.
Philoa. Tranaact, Y.170B; p.lio6.
Pierre Fbtit,
A letter aboat the loadatone» — — -and the variation of the varla^
4ioB 18 eBamined. Ibid. ¥.1667. ^.527.
Edmund Hallbt/
Theory of the variation of the magnetical eompasa.
Ibid. Y. 1683. P- 208. . ^

Acconnt of the caoae of the change of the variation of the roagoetlcal

needle; with an hjpothesia of the stxuctiire of the internal

parts of tlie earth. Ibid. Y. 169:2. p*56i.
Some remarks on the variatloos of the magnctical compasa, — with

regard to the gencrai chart of those variations; also conoeniing'

the true longHude of the Mageliaa Streights.
Ibid. Y.r7l4. Pr 165*
Melckior Lbydeckeb, ^ ..
Epistola de varlatione magnetia a ano qnondam aolito pnBCto.
Misceli. Acad. Nat. Curios. Dec.a. A.3. l688* Append. p.44$.
Anders Cblsius.
AnmSrkningar om magnet - nSlena atondcliga f^rtodringar-*B(i dea
miswisning. Vetensk* Acad. Handi. A« 174^ S. 30;!«

Andrea^



t



Phjfsiea. ^ jgx

Andreas CBLfliui,
Aomerknfkgeii fiber dte •tdndlicbe VerSadenmgen der Magoet • Nad^el
in ihrer Abweichung.
Schwedische Akad, Abhandl. 1.1740. 5.45.
Olav Peter Hi5rter,
Om magnet -^n&lens Stakillige SndriBgar» aom aF framledne Prbf. Ani»
CEL0IO0 blifvit i akt tagne och eedan vidare obierverade.
Yctenjk. Acad. Handl, A. 1747. S.97.
