358 



CATALOGUE. PRACTICAL ASTRONOMY, GEOGRAPHY. 



Moon's appearance. 

 Grandjean de Fouchy on deducing the longi- 

 tude from the appearance of the lunar 

 mountains, A. P, 1733. H. 76. 



Observatioiu of the Earth's Motion. 

 Hooke and Newton on a falling stone. Birch. 



III. 516, 519. 



Hooke observes that it should fall south eastwards. 

 Newton's letters. Commercium epistolicum. 

 Hooke on the motion of the earth. Nich. II. 



84. 

 Proposal for experiments on a diurnal titu- 



bation of the earth. A. P. 1742. H. 104. 

 Poleni de pendulorum perturbatione. Ph.tr. 



1743. 299. 



Thinks there should be a difference according to the di- 

 rection of the vibration. 



Gulielmini's experiments. Nich. II. 84. 

 Saladini on the declination of falling bodies. 



Ac. Sienn. VII. 55. 

 Benzenberg. Ph. M. XV. 



Found in a height of 235 feet Fr. a declination of a falling 

 body 4 lines eastwards and inline southwards. 



Laplace on the fall of a body from a great 

 height. B. Soc. Phil. n. 75. 



Makes the deviation 3.9 lines eastwards at Hamburg for 

 235 feet: attributes the 1.5 lines southwards observed by 

 Benzenberg to some accidental or meteorological cause. 



Geography. 



Figure and Magnitude of the Earth. 



See Laws of Gravity. 



Picart on the measurement of the earth. A. 



P. VII. i. 46. 



Acc.Ph.tr. 1675. X. 261. 

 Account of Norwood's measurement. Ph.tr. 



1676. XI. 636. 



Norwood was " a reader of the mathematics" in London. 

 He measured principally by chains, observing the angles, 

 and partly also by paces. 

 1 



Birch. Hist. R. S. I. 133. 



Eisenschmidius de figura telluris. Strasb. I69I. 



4. M. B. 

 Cassini on Snellius's measurement. A. P. 



1702. 60. H. 82. 

 Cassini de la figure de la terre. 12. Amst. 



1723. 

 Cassini on the figure of the earth. A. P. 1735. 



255. 1736. 64. H. 80. 

 Cassini's measurement of an arc. A. P. 1740. 



Suite. 

 A. P. 1718. Suite. 

 Mairan on the diminution of degrees. A. P. 



1720. 231. H.65. 

 Desaguliers on the figure of the earth. Ph. 



tr. 1725. XXXIII. 201, 239, 277. 



Shows the insufficiency of Cassini's measures : observes 

 that a revolution round a larger axis must be unstable. 

 Musschenbroek. Diss. Phys. 355. 

 Maupertuis on the figure of the earth. Ph. 



tr. 1733. 1736. 302. A. P. 1737- 389. H. 



90. 

 Maupertuis on the figures of the heavenly 



bodies. A. P. 1734.55. H. 88. 



Maupertuis Figure de la terre determinee. 12. 

 Amst. 1738, 



Maupertuis on the voyage to Peru. A. P. 

 1744. 249. H. 35. 



La Condamine on an instrument for deter- 

 mining a parallel circle. A. P. 1733. 294. 

 H.53. 



La Condamine's extract of the operations " 

 near the equator. A. P. 1746. 6 18, 



La Condamine Journal du voyage a I'equa- 

 teur. 4. Par. 1751. M. B. 



LaCondamineMesurede trois premiers degr«s. 

 4. Par. 1751. M. B. 



Clairaut's inferences from the perpendicular 

 to the meridian. A. P. 1733. 406. H. 59- 



Clairaut on Cassini's new mode of determi- 

 nation, A. P. 1735. 117. H. 51. 



