ASTRONOMY. 209 



phie set forth and demonstrated (after a two-fold manner) in the hori- 

 zontall plane onely ; together with rules for the mensuration of circles and 

 spheres, and also cylinders, both in solid and liquid measure. 4 Lon- 

 don, 1639. 



WYNNE (HENRY). The description and uses of the general horological- 

 ring, or universal ring-dyal ; with a large and correct table of the lati- 

 tudes of the principal places in every shire throughout England and 

 Wales. 12 London, 1682. 



X. 



XIMENES (LEONARDO). Del vecchio e nuovo gnomone Fiorentino e 

 delle osservazioni astronomiche, fisiche ed architettoniche fatte nel ve- 

 rificarne la costruzione, libri iv; ai quali premettesi una introduzione 

 istorica sopra la coltura dell' astronomia in Toscana, 4 Firenze, 1757. 

 . Dissertazione intorno alle osservazioni solstiziali del 1775 allo gno- 

 mone della metropolitana Florentine, 4 Lirorno, 1776. 



Y. 



YOUNG (THOMAS). See Anonymous. Elementary illustrations of the 

 celestial mechanics of Laplace. 8 1821. (Mechanics.) 



. Astronomical chronology of Egypt. See Anonymous. Memoir of 



the life of T. Young, &c. 8 1831. (Miscellaneous.) 



. See Anonymous. Tides, &c. 4 



YPOCRATES [?]. Astrologia, See Toledo (G.). Epistola astrologiae 

 defensiva, 4 1508. 



Z. 



ZACH (FRANCOIS de). L'attraction des montagnes...sur le niveau des 

 instrumens d'astronomie. See Zach (F. de). L'attraction des mon- 



tagnes, &c. 8 1814. (Mechanics.) 

 Nachrichten von der Preussischen trigonometrischen und astrono- 



mischen Aufnahme, &c. See Zach (F. von). Nachrichten, &c. 4 1806, 



&c. (Mathematics.) 

 De vera latitudine et longitudine geographica Erfordiae. 4 



Erfurt, 1790. 

 Monatliche Correspondenz zur Beforderung der Erd- und Himmels- 



kunde; 28 vols. 8 Gotha, 1800-1813. 

 Correspondence astronomique, geographique, hydrographique, et 



statistique; 14 vols. & 1st pt. of vol. xv. 8 Genes, 1815-1826. 

 Tables abreges et portatives de la Lune, calculees pour le mSridien 



de Paris. 8 Florence, 1809. 

 Tabulae motuum Solis novae et correctae ex theoria gravitatis et 



observationibus recentissimis erutae ; accedit fixarum praecipuarum cata- 



logus novus ex observationibus astronomicis ann. 1787-1790 in Specula 



astronomica Gothana habitis. 4 Gothce, 1792. 

 Tabulae motuum Solis novae et iterum correctae ex theoria gravitatis 



el. de Laplace et ex observationibus recentissimis in Specula astronomica 



Ernestina habitis erutae; supplem.ad tab. motuum Solis an. 1792 editas. 



4 GothtB, 1804. 

 . Tabulae speciales aberrationis et nutationis in ascensionem rectam ct 



in declinationem ad supputandas stellarum fixarum positiones sive ap- 



parentes sive veras, una cum insigniorum 494 stellarum zodiacalium ca- 



talogo novo in specula astronomica Ernestina ad initium anni 1 800 con- 



structo ; 2 vols. 4 Gothce, 1 806-1 807. 



