ON ABSORPTION SPECTRA OF ORGANIC COMPOUNDS. 131 



Absorption Spectra and Chemical Constitution of Organic Com- 

 pounds. — Report of the Committee, consisting of Sir J. J. 

 DoBBiE {Chairman), Professor E. C. C. Baly {Secretary) , 

 and Dr. A. W. Stewart. 



In presenting the subjoined Report on Absorption Spectra and Chemical 

 Constitution the Committee would draw attention to tlie fact that a 

 Committee, composed of Sir W. N. Hartley, Sir James Dobbie, and 

 Dr. A. Lauder, presented reports on this subject to the meetings of the 

 British Association held in 1900, 1901, 1902, and 1903. Since 1903 

 the investigation of Absorption Spectra has been very considerably 

 extended, and it was thought advisable to bring the subject up to date. 



The list is believed to include every compound the Absorption 

 Spectrum of which has properly been measured in the infra.-red, visible, 

 or ultra-violet regions of the spectrum. An addendum has been made, 

 containing a list of those compounds the fluorescence or phosphorescence 

 of which has been measured. 



The journals are denoted by the usual abbreviated titles, with the 

 exception of the Journal of the Chemical Society (London), w^hich 

 is referred to simply as Trans. 



List of Organic Covipoimds, the Absorption Spectra of lohich have been 

 measured in the visible and ultra violet. 



Acenaphthene. Baly and Tuck. Trans., 93, 1902 (1908). 



Purvis. Trans., 101, 1315 (1912). 

 Acenaphthenequinone. Baly and Stewart. Trans., 89, 502 (1906). 

 Acenaphthylene. Baly and'Tuck. Trans., 93, 1902 (1908). 

 Acetaldehyde. Purvis and McCleland. Trans., 101, 1910 (1912). 



Bielecki and Henri. Compt. rend., 155, 466 (1912). 



Ber., 45, 2819 (1912). 

 Phys. Zeit., 14, 516 (1913). 

 Ber., 46, 3627 (1913). 

 Henri and VViumser. Compt. rend., 156, 230 (1913). 

 Jour, de Phys., 3, 305 (1913). 

 Acetaldehyde-/>bromophenylhydrazone. Baly and Tuck. Trans., 89, 982 (1906). 

 Acetaldehydephenylhydrazone. Baly and Tuck. Trans., 89, 982 (1906). 



Stobbe and Nowak. Ber., 46, 2887 (1913). 

 Acetaldehydephenylmethylhydrazone. Baly and Tuck. Trans., 89, 982 (1906). 

 Acetaldoxime. Hartley and Dobbie. Trans., 77, 318 (1900). 



,, Bielecki and Henri. Compt. rend., 156, 1860 (1913). 



Acetamide. Bielecki and Henri. Compt. rend., 156, 1860 (1913). 

 Acetanilide. Baly, Tuck, and Marsden. Trans., 97, 571 (1910). 



,, Crymble, Stewart, Wright, and Glendinning. Trans., 99, 451 (1911). 



Acetic acid. Hartley and Huntington. Phil. Trans., 170, I. 257 (1879). 

 „ „ Bielecki and Henri. Compt. rend., 155, 456, 1617 (1912). 

 Ber., 45, 2819 (1912). 

 Ber., 46, 1304, 2596, 3627 (1913). 

 Phys. Zeit., 14, 516 (1913). 

 Compt. rend., 156, 550 (1913). 

 Compt. rend., 157, 372 (1913). 



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