206 NOTES AND REFERENCES. 



in connection with the Undulatory Theory (Phil. Mag. Decem- 

 ber 1863). 

 SEEBECK, Heat of Coloured Rays (firewater's Optics, p. 90). 



118. KNOBLAUCH (Ann, de Ch. vol. xxxvi. p. 124, and Fogg. AT\TI. there 



referred to). 



119. HERSCHEL, Epipolised Light (Phil. Trans, vol. cxxxv. pp. 143, 147). 

 STOKES, Change in Refrangibility of Light (Phil. Trans, vols. cxlii. 



cxliii.) 



123. For the first enunciations of the Corpuscular and Undulatory Theories, 



see NEWTON'S Optics, HOOKJE'S Micographia, and HUYGHENS' Trac- 

 tatus de Lumine. See also BREWSTER'S Optics, p. 138. 



124. YOUNG, Lectures edited by Kelland, p. 358, et seq. ; Phil. Trans. 



1800, p. 126; HERSCHEL, Encyc. Metro, art. Light, pp. 450 and 

 738 ; NEWTON'S Optics, p. 822 ; WHEWELL'S Hist. Indue. Sc. vol. 

 ii. p. 449 ; FOUCAULT, Comptes rendus, Paris, 1850, p. 65 ; HARRI- 

 SON, Phil. Mag. November 1856 ; Camb. Phil. Trans. 



126. SONDHAUSS, Refraction of Sound (Ann. de Ch. et de Phys. vol. 

 xxxv. p. 505) ; DOVE, Polarisation of Sound (Cosmos, May 13, 

 1859). 



182. PASTEUR, Rotation of Plane of Polarised Light by Solutions of 

 Hemihedral Crystals (Ann. de Ch. et de Phys. vol. xxiv. p. 442). 



134 to 135. WOLLASTON, PhiL Trans. 1822, p. 89 ; WHEWELL, Phil, of 

 the Induct. Sc. vol. i. p. 419 ; WILSON, Trans, of the Roy. Soc. of 

 Edin. vol. xvi. p. 79 ; Sir W. HERSCHEL, Phil. Trans. 1793, p. 201, 

 and 1801, p. 300 ; MORGAN, Phil. Trans, vol. Ixxv. p. 272 ; DAVY, 

 Phil. Trans. 1822, p. 64 ; Elements of Chemical Philosophy, p. 97 ; 

 GASSIOT, Phil. Trans. 1859, p. 157. 



187. Diminishing Periods of Comets (Herschel's Outlines of Astronomy, 

 p. 357). 



140. Since writing the passage in the text, I find that STRUVE has been 

 led, from his astronomical researches, to the conclusion that some 

 light is lost in the interplanetary spaces. He gives as an approxi- 

 mation one per cent, as lost by the passage of light from a star of 

 the first magnitude, assuming a mean or average distance (Etudes 

 d' Astronomic Stellaire, 1847). 

 NEWTON, Thirtieth Query to the Optics. 



142. FARADAY, Evolution of Electricity from Magnetism (Phil. Trans.* 

 1832, p. 125). 



144. FARADAY, Magnetic Condition of all Matter (Phil. Trans. 1846, p. 21 ; 



Phil. Mag. 1846, p. 249). 



BECQUEREL, Ann. de Ch. et de Ph. torn, xxxvi. p. 337; Comptes 

 rendus, Paris, 1846, p. 147 ; and 1850, p. 201. 



