2 LITERATURE OF THE BPECTROSCOPE. 



l; : h l; . ■ ■ •' - ph). Opuscula, Bassano, 1784, 5 vols., 4°. Opera 

 pertinentia ad Opticam el AjBtronomiam (Aator Library). 

 Brit., eighth edition, I, 721-2, 7 

 i II- made a delicate micrometer with douhle refraction, id"Hit 177: 

 observed the lary Bpectrom, consisting of purple and 



green light.) 



Bouguer (Pierre), 1698-1758. Essai d'Optique, but la Gradation de la 

 Lumiere. Paris, 1729, * D ; ed. La Caille, Paris, 1760, A , 

 Ency. Brit., eighth edition, I. 738 t 

 5e published a Dumber of treatises on the gradation of light.) 



Brewster (Sir David), 1781-1868. Treatise on Optics. Edinburgh, 18 '1. 

 New Analysis of Solar Li<:lit, indicating three primary colours, 

 forming coincident spectra of equal length, Edinburgh, 1834, 



of 15. by Mrs. Gordon.) 



Buffon. 



In his "Epoques do la Nature " he describes light and heat as known 

 in his times.) 



Delaunay. Notice sur la Constitution de TUniverse. Premiere Parti.-: 

 Analyse Spectrale, Annuaire du Bureau dea Longitudes, 1869, 



Paris, 8°. 



(A masterly treatise on the =ul>joot sit that time.) 



Desains (P.), Recherchea experimentales sur lea anneauz colores de New- 

 ton. Comptes Rendus, 78,219-21; Phil. Mag. (4) 47,236-7. 



Dolland (John), 1706-61. Bee Proc Royal Boo., 50 (1757) 733, and 

 Ency. Brit., eighth edition, I, 710-51. 



II. | that dispersion depends not on the mean refraction but 



on the constitution <>f the diaphanous medium.) 



Draper (Henry). Obituary by G. F. Barker in Amor. Jour. Bci. 

 26,89. 



Draper (J. W. , Early Contributions to Spectrum Photography. Na- 

 ture, 10, 24::- 1. 



Dutirou i l'abb.' . Memoire sur la determination dea indices de refrac- 

 tion dei Bepl raia <!«■ Praunhofer dans one aerie nombreuse 



At,- I P 28 [I860] 176. 



Exner (K I. !>!'• Fraunhofer echen Binge, <li'' Quetelet 'scheu Streifen 

 \nu\ verwandte Erscheinung 



I 76. 1 1 



