CATALOGUE. — TERRESTRIAL MAGNETISM. 



441 



Ship! are sometimes carried into the Bristol channel in- 

 stead of the British, by mistalting the variation, not by a 

 current. 

 Wallison Halley's chart. Ph.tr. 1702.XXIII. 



1106. 

 Saunderson. Ph. tr. 17'20. XXXI. 120. 



In the Baltic. 

 Rogers and Halley. Ph. tr. 1721. XXXI. 



173. 

 Cornwall. Ph. tr. 1722. XXXII. 55. 



In the Ethiopic ocean. 

 -[-Leeuwenhoek on the magnetism of an iron 



cross. Ph. tr. 1722. XXX FI. 72. 

 Graham. Ph. tr. 1724. XXXIK. 96. 



Observes a diurnal change of variation, 



Graham on the dip. Ph. tr. 1725. XXXIII. 



332. 

 About 74° 40' in 1 723. Notes the frequency of vibration. 



Graham. Ph. tr. 1748. XLV. 279- 

 Middleton. Ph.tr. 1726. XXXIV. 73. 1731. 



XXXVII. 71. 1730. XXXIX. 270'. 1742. 



XLII. 157. 



In Hudson's Bay. 

 Robin's tables from Middleton. Ph. tr. 1731. 



XXXVII. 69. 1733. XXXVIII. 127. 

 Hoxton on an agitation of the needle in a 



storm. Ph. tr. 1731. XXXVII. 53. 

 Hoxton. Ph. tr. 1739. XLI. 17 1. 



Atlantic. 

 Musschenbroek. Ph.tr. 1732.XXXVII.428. 



At Utrecht. 

 Musschenbroek's chart for 1744. Introd. II. 



At the end. 

 On board the Hartford. Ph. tr. 1732. 



XXXVII. 331. 

 Harris. Ph. tr. 1733. XXXVIII. 75. 

 Elvius. Sdnv. Abh. 1747-89. 

 Wargentin on the effect of an aurora borea- 



lis. Ph.tr. 1751. 126. 

 Mountaine and Dodson on the magnetic 



chart. Ph.tr. 1754.875. 

 ♦Mountaine and Dodson's tables of 50 000 



observations. Ph. tr. 1757. 329. 



*OL. II. 



For 1700, 1710, 1720, 1730, 1744, and 1750. Con- 

 clude that no calculations can extend to all the changes. 



Mountaine on maps and charts. Ph. tr. 



1758. 563. 

 *Mountaine and Dodson's chart. R. I. 

 Mountaine on the variation from 176O to 



1762. Ph. tr. 1766.216. 

 Williams on ascertaining the longitude by 



the variation. Load. 1755. Engl. Ital. 



Written by Dr. Johnson. 



Euler's theory of the magnetic declination. 



A. Berl. 1755. 117. 1757. 175. I766. 213, 

 Strmncr et ZegoUstroni de declinatione. Ups. 



1755. 

 Euler's theory. A. Berl. J 755. 107. 1757. 



175. 1766. 

 Canton on the diurnal variation. Ph. tr, 1759. 



398. 

 With tables. 



Mayer's theory. GiJlt, Anz, 176O. 633. 1762, 

 377. Lichtenberg in Er.xleben. Mayer 

 Op. posth. 

 Confused and inaccurate. Kobison. 



Mtindert Sorrey Beschaffenheit der erdkugei 



aus der wirkung des magnets. 1744. 

 Bdlin Carte des variations. Par. 1765. 

 Lambert. A. Berl. 1766. 

 Wilke's chart. Schw. Abh. XXX. 209. 



A, P. 1772. ii. 464. 

 Wilke iiber den magneten. 

 Eckeberg's observations. Schw. Abh. XXX. 



238. 

 Mallet's observations in Lapland. Ph. tr. 



1770. 363. 

 Cook.Ph.tr. 1771.422. 

 Lemonnier. A. P. 1771.93. H.29. 1772. ii. 



457. H. 56. 1773. 440. H. 1. 1774. 237. 



H. 5. On the dip. 1777- 89. H. 4. 

 Lemonnier Loix du magnetisme. 

 On the line of no declination. Lemonnier. 



A. P. 1777. 168. 



St 



