ILLUSTRATING ITALIAN SCIENCE. 903 



Day Telescope of Campani, romano, object-glass 47 mm. 

 in diameter ; eye-glass, double convex, 27 mm. in diameter ; second 

 and third lenses the same. 



Astrolabe of Lord Dudley. 



Astrolabe of ji Florentine author, with seven discs of change, 

 one of them with a geographic planisphere. 



Astrolabe of an Italian author, with a planisphere of Rojas. 



Astronomical Ring of Ignazio Danti, a celebrated astro- 

 nomer and mathematician of Perugia. 



" Quadrant Orario " of Cosimo I. dei Medici, to the latitude 

 of 43 45', made in Florence in 1566, probably by Ignazio Danti. 



"Quadrant Orario" to the latitude of 43 45', made in 

 Florence in 1565 by Giovan. Battista Giusta. 



" Instrumento del Frimo Mobile " of Apiano, executed 

 in Florence in 156S by Ignazio Danti. 



Compass, made in Venice in 1564 by Antonio Blanchini, 

 watchmaker. 



Nautical Compass, made in 1607 by Baldassare Lancaeuj, 

 of Urbino. 



Goniometric Compass, of Paolo Massucsiuj, of Lucca. 

 Graphometer of Botti. 



Dodecahedron, with eleven solar watches, made in Florence 

 in 1587. 



Horizontal Solar Watch. 



Horizontal Watch, at the latitude of 43 44', made by 

 Cammillo della Yolpaja, Florentine, in the second half of the 16th 

 century. 



Vertical Watch, of boxwood, at the latitude of 43 30', 

 made in Florence in 1590 by Girolamo della Volpaja. 



Night Watch, at the latitude of 43 30', made in Florence in 

 1568 by Girolamo della Volpaja. 



Perpetual Almanack. 



liens of Benedetto Bregans, 42 cm. in diameter, given to 

 the Grand Duke Cosimo III. after 1690. With this lens Avesani 

 and Yargioni, 13 years after the extinction of the Accademia del 

 Cimento, made the well-known experiments on the combustion of 



