MATHEMATICS. 99 



weight; and withall the artificial practical geometry of regular like 

 solids ; and of a cylindricall body, being an expedite way of gauging ; 

 and lastly an a-tactometrie for the discovering of the diraensionall quan- 

 tities of any irregular kind of body. 8 London, 1650. 



Y. 



YOUNG (J. R.). An elementary treatise on algebra, theoretical and 

 practical, for the use of students. 8 London, 1827. 



Elements of geometry, with notes. 8 London, 1827- 



. The elements of analytical geometry ; comprehending the doctrine 



of the conic sections, and the general theory of curves and surfaces of 

 the second order, for the use of students. 12 London, 1830. 



. The elements of the differential calculus, comprehending the general 



theory of curve surfaces and of curves of double curvature ; intended for 

 the use of mathematical students. 12 London, 1831. 



. The elements of the integral calculus, with its applications to geo- 

 metry and to the summation of infinite series ; for the use of students. 

 12 London, 1831. 



YOUNG (Sir WILLIAM). Life of B. Taylor. See Taylor (B.). Con- 

 templatio philosophica, &c. 8 1793. (Miscellaneous.) 



YVONdefo LEU (PAUL) [?]. See Anonymous. Nullite des demon- 

 strations que Mr. Hardy a employees, &c. 4 1641. 



. Quadrature du cercle ; avec les eclaircissemens par operations nu- 



merales : et la parfaicte proportion du diametre a la circonference don- 

 nee et adjoustee par M. Vander-Bist. 4 Rochelle, 1619. 



Z. 



ZACH (FRANZ von). Nachrichten von der kb'nigl-Preussischen trigono- 

 metrischen und astronomischen Aufnahme von Thiiringen und dem 

 Eichsfelde und von der Sachsen-Gothaischen Grandmessung zur Bes- 

 timmung der wahren Gestalt der Erde ; vol. I. 4 Gotha, 1806. 



H2 



