208 REPORT~1901. 



Abbreviated Title. Full Title. 



Sitzungsb. Akad. Berl. . Sitzungsberichte der Akademie der Wissenschaften zu 



Berlin. 



Sitzungsb. Akad. Miincheu Sitzungsberichte der koniglich baierischcn Akademie 



zu Miinchen. 



Sitzungsb. Akad. Wien. . Sitzungsberichte der Akademie der Wissenschaften zu 



Wien. 



Sitzungsb. phys.-med. Soc. Sitzungsberichte der phys.-medicinischen Societat zu 



Erlangen. Erlangen. 



Skand. Arch. f. Physiol. . Skandinavisches Archiv fiir Physiologie (Leipzig). 



Yerh. phys. Gesellsch. Verhandlungen der physikalischen Gesellschaft zu 



Berlin. Berlin. 



Versl. d. K. Akad. Wet. Verslagen van de Koninklijke Akademie van Weten- 



Amsterdam. schappen te Amsterdam. 



Wien. Anz. . . . Anzeiger der k. Akademie der Wissenschaften zu Wien. 



Zeitschr. f. anal. Chem. . Zeitschrift fiir analytische Chemie. 



Zeitschr. f. anorg. Chem. . Zeitschrift fiir anorganische Chemie. 



Zeitschr. f. Kryst. u. Min. . Zeitschrift fiir Krystallographie und Mineralogie. 



Zeitschr. f . phyi-ikal. Chem. Zeitschrift fiir physikalische Chemie. 



Zeitschr. f. phys. u. chem. Zeitschrift fiir physikalischen und chemischen Unter- 



Unterr. richt. 



Zeitschr. f. physiol. Chem. Zeitschrift fiir physiologische Chemie. 



Zeitschr. f. wiss. Micro- Zeitschrift fiir wissenschaftliche Microscopie. 



scopie. 



Absorption Spectra mid Chemical Constitution of Organic Substances. — 

 Third Interim Repjort of the Committee, consisting of Professor W. 

 Noel Hartley (Chairman and Secretary'), Professor P. R. Japp, 

 Professor J. J. Dobbie, and Mr. Alexander Lauder, appointed 

 to investigate the Relation between the Absorption Spectra and 

 Chemical Constitution of Organic Substances. 



Appendix. — List of Ahsorption Spectra investigated page 225 



The Committee decided to report this year upon the examination of 

 i.someric cyanogen compounds. The preparation of some of these sub- 

 stances in a state of purity had proved to be an exceedingly tedious piece 

 of work, but the labour bestowed has been fully justified by the results 

 obtained. 



A further contribution to studies in tautomerism has been completed 

 by an examination of the absorption spectra of dibenzoylmethane and 

 c(-oxybenzalacetophenone (a-hydroxybenzylidene acetophenone). 



Some work on the subject of dyes and the examination of phloro- 

 glucinol and its derivatives has also occupied much -attention ; this work 

 is, however, not yet quite so complete as to admit of it being embodied 

 in this report. The Committee desire to be reappointed for the purpose 

 of completing the work now in progress. 



The Absorption Spectra of Cyanogen Compounds. By Walter Noel 

 Hartley, F.R.S., James J. Dobbie, D.Sc, M.A.,'and Alexander 

 Lauder, £.Sc.^ 



The following investigation was undertaken with the view of ascer- 

 t£iining whether by an examination of the absorption spectra of the 

 cyanogen compounds it might be possible to throw some light upon the 



' Trans. Chem. Soc., 1901, 79, p. 848. 



