ON OPTICAL INSTRUMENTS. 339 



cueil, iii. 122. Studer, Gilb. Ann. Ixvi. 8. Von Reise, Vorschlage zu einem Neuen 

 Goniometer, Bonn, 1829. 

 'Kaleidoscope. Art. in Ed. Encyc. by the inventor, Brewster. 



Sextant. Hooke, Animadversions on Hevelius, 4to, 1674, Birch, ii. 394. Had- 

 ley's Inst. Ph. Tr. 1731, p. 147; 1732, p. 32. Dollond's Alterations on do. ibid. 

 1772, p. 99. Atwood's Theory of do. ibid. 1781, p. 395. Encke on do. Astron. 

 Jahrbuch, 1830, p. 285. Adie on Metallic Reflectors for do. Proceedings of Roy. 

 Soc. Ed. 1845. 



Microscope. Treatises. Hooke's Micrographia, fol. 1665. Grindelius, Micros. 

 Nov. Norimb. 1687. Joblot, Description des Plusieurs Micros. Paris, 1708. 

 Observations Micros. 1754. Wideburg, De Micros. Solari, Erlang. 1755. Due de 

 Chaulnes, Descrip. d'un Micros, fol. Paris, 1768. Brander, Beschreibung zweier 

 Mic.,Augsb. 1769. Baker on the Mic. 1769. Martin's Optical Essays, 1770. 

 Descrip. of a Graphical Perspective and Micrometer, 1771. De la Barre, Mem. sur 

 les Mic. 1777. Gleichen, Vom Sonnenmicros. 4to, Nurimb. 1781. Tiedemann, 

 Stuttgart, 1785. Adam's Essays on the Mic. 4to, 1798. Villars, Mem. sur le 

 Mic. Paris, 1806. Amici, Mem. di Micros. Modena, 1818. Goring and Pritchard's 

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 wenhoek's, ibid. 1673, p. 6037. Huygens's, Hist, et Mem. x. 427. Wilson's, Ph. 

 Tr. 1702, p. 1241. Adams's, ibid. 1710, p. 24. Baker's, ibid. 1736, p. 442. 

 Lieberkuhn's Solar do. ibid. 1740, p. 516, and Hist, et Mem. de Berlin, 1745, p. 14. 

 Euler's, Nov. Com. Petr. iii. 363. Aepinus's, ibid. ix. 316. Zeiher's, ibid. x. 299. 

 Selva's, Hist, et Mem. de Paris, 1769, H. 129. Brewster's, Ph. Mag. iii. 74, viii. 316, 

 and New Philosophical Insts. Rossi's, Baumgartners Zeitsch. v. 95. Ehrenberg's, 

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 Chevalier and Goring, ibid. p. 224, &c. 



Telescope. Mersenne, Universse Geometrise Synopsis, 4to, Paris, 1644. Hooke, 

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 1767 (various memoirs). Kratzenstein and Euler on the Iconantidiptic Teles. 

 Acta Petr. iii. I. 192, 201. Hertel, Anweisung Teles, zu Verfertigen, Halle, 1747. 

 Clairaut on the Improvement of Teles. Hist, et Mem. 1756, p. 380, H. 112 ; 1757, 

 p. 524, H. 153 ; 1762, p. 578, H. 160. Scherfer on Dioptrical Tel. by Hardy, 

 1768. Rochon's Achromatic Tel. Hist, et Mem. 1773, p. 299 ; Reflecting do. Ph. 

 Mag. ii. 19, 170. Lagrange on the Theory of do. Mis. Taur. iii. II. 152 ; Hist. 

 et Mem. de Berlin, 1778, p. 162. Navarre's Tel. Hist, et Mem. 1778, H.56. 

 Fuss on Tel. 4to, Leipz. 1778. Oriani, Mem. de la Soc. Ital. iii. 664. Biirja, Hist, 

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 iii. 3. Repertory of Arts, vii. 15. Kater, Comparison of Cassegrain's with Gre- 

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 1818. Guilio, Mem. di Torino, xvi. 128. Brewster's, Phil. Mag. vii. 323. Lord 

 Oxmantown, ibid. ix. 25, new series, ii. 136. 



Micrometers. Huygens, Systema Saturnium, Hag. Com. 1659. Auzout and 

 Hooke, Ph. Tr. 1665-6, i. 123. Hooke on Gascoigne's Screw Mic. ibid. ii. 541. 

 Lefevre's Mic., Mach. Appr. ii. 103. Kirckius's, Mis. Berl. i. 202. Cassini's, Hist, 

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 de Berlin, 1756, p. 365. Wilcke's, Schwed. Abhand. 1772, p. 56. Boscovich's, 

 Ph. Tr. 1777, p. 789. Kohler's, Bode's Jahrbuch, 1785, p. 155. Smeaton's, Ph. Tr. 

 1787, p. 318. Rochon's (Rock Crystal), Nov. Act. Petr. 1788, H. 37. Jour, de 

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 also 1820, p. 126. Dollond's, ibid. 1821, p. 101. Brewster's, Ph. Mag. i. 104; iv. 

 164. Treatise on New Philosophical Instruments, ed. 1813, pp. 48, 173. Amici's, 

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 364. Hansen on do. Gotha, 1827. Bessel on do. Schumacher, viii. 397. Stein- 

 heil's, ibid. v. 359. 



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