ty*<^~ 



16 ASTRONOMICAL MODELS 



83. Miniature Copernican Planetarium within an Armillary 



Sphere. 



Silver. 



* Orrery Coll. u. 

 I. Rowley fecit. 



This exquisitely finished working model of the second of Rowley's 

 Planetaria, above mentioned, is probably one of the finest small astro- 

 nomical models ever made in England. It is supported on an ebony 

 base by a tripod, between the legs of which is a mag netic compass for 

 orientation. This 'very childish toy', as Herschell would have called 

 it, is enclosed in a turned brass-bound casket of lignum vitae. 



84. Orrery. 1731. 



Christ Church. 

 Circle 3 feet in diameter, i foot high. 



Made by THO. WRIGHT (Mathematical Instrum 1 



Maker to His MAJESTY GEORGE y e II d ) in 



Fleet street LONDON. 



85. Orrery. c. 1750. 



Queen's College. 

 Made by B. Cole and Son 



at the 



ORRERY 

 Fleet St. 

 London : 



86. Nocturnal. i8th cent. 



University Observatory. 



Boxwood, marked with rose and fleur de lys stamps. The rose 

 stamps are identical with those put by Joseph Stutchbury upon his 

 Excise slide-rules, and may also be seen upon an Edm. Culpeper 

 Backstaff in the Pitt-Rivers Collection. 



87. Nocturnal. i8th cent. 



Radcliffe Observatory. 



Boxwood. A very similar instrument of the type described by 

 Sir Jonas Moore, A New System of Mathematics, 1681. 



The Nocturnal can be traced back to the Instrumentum Syderale 

 described in the Pet. Apiani Cosmographia, per Gemmam Phrysium 

 apud Louanienses, 1539. And even in the preceding century we find 

 figures of instruments that would serve the purpose as, for instance, 

 a figure in MS. Digby 48, perhaps of the date 1433-62. 



