( 66 ) 



garithms of the numbers from 1 to 10000, p. 3G9 — 391; Lo- 

 garithms of Sines, Cosines, Tang, Cotang, p. 392 — 414. Bij 

 de Sixth Edition, enlarged and corrected. London Printed for 

 J. johnson, g. wilkie and J. robinson, etc. 1810, zijnde 

 logarithmen der getallen achter het eerste deel, die der trigo- 

 nometrische functiën achter het tweede gebragt. Hier zijn, 

 bij verandering van de twee eerste cijfers van beteekenis 

 in de logarithmen, in de negen gewone kolommen dikke 

 stippen aangebragt, om dit duidelijk in het oog te doen 

 vallen. 



60) An introduction to the theory and practice of plane 

 and spherical trigonometry, and the orthographic and ste- 

 reographic projections of the sphere; including the theory 

 of navigation: Illustrated by a variety of. Practical Exam- 

 ples, and applied to the Mensuration of Heigths and Dis- 

 tances; to determining the Latitude by two Altitudes of 

 the Sun, the Longitude by. the Lunar Observations, and to 

 other important Problems on the Sphere, and in Nautical 

 Astronomy. By thomas keith, Private Teacher of Mathe- 

 matics and Geography. London: Printed by a. strahan, 

 Printers-street, for the author; longman and rees, Pater- 

 noster Eow; and vernor and hood, in the Poultry, 1801. 

 XVI, B— 3 G (a 8 blz.) ■■= 414 blz. 8°. Op blz. 367 begin- 

 nen de Tables. I, of the Logarithms of Numbers, from an unit 

 to ten thousand; II, of natural Sines to every degree and 

 minute of the quadrant, from which the versed sines are 

 readily found: the radius being an unit; III, of Logarith- 

 mical Sines and Tangents to every degree and minute of the 

 quadrant: from which the secants and versed sines may be 

 readily found. The Natural radius being ten thousand 

 millions; and the logarithmical radius 10. — Alle in vijf 

 decimalen. 



61) New mathematical Tables, containing the factors, 



