ON ABSORPTION SPECTRA OF ORGANIC COMPOUNDS. 367 



Phylloerythrin. Marchlewski and Moroz. Bull. Soc. Chim., 35, 705 (1924). 

 Piaselenol. Battegay and Vechot. Bull. Soc. Chim., 37, 1271 (1925). 

 a-Picoline. Herrmann. Zeit. wiss. Phot., 18, 25.3 (1919). 

 p-Picoline. Herrmann. Zeit. wiss. Phot., 18, 253 (1919). 

 Picolinic acid. Htinecke. Ber., 60, 1451 (1927). 



„ ,, Ley, Schvvarte and Munnich. Ber., 57, 349 (1924). 



,, ,, copper salt. Hunecke. Ber., 60, 1451 (1927). 



,, ,, ferrous salt. Ley, Schwarte and Munnich. Ber., 57, 349 (1924). 



,, ,, sodium salt. Hiinecke. Ber., 60, 1451 (1927). 



Picramic acid. Vies. Compt. rend., 170, 1242 (1920). 

 Picric acid, sodium -salt, von Halban and Ebert. Zeit: phys. Chem., 112, 321 



(1924). 

 Pinachrome. Holmes. J. Ind. Eng. Chem., 16, 35 (1924). 

 Pinacyanol. Konig. Ber., 55, 3293 (1922). 



Lasareff. Zeit. phys. Chem., 100, 266 (1922). 

 Mills and Odams. Trans., 125, 1913 (1924). 

 Piperic acid. Purvis. Trans., 125, 406 (1924). 

 Piperidine. Herrmann. Zeit. wiss. Phot., 18, 253 (1919). 

 Ley and Volbert. Ber., 59, 2119 (1926). 

 Ley and Zschacke. Ber., 57, 1700 (1924). 

 Piperidoacetic acid. Ley and Zschacke. Ber., 57, 1700 (1924). 



„ ethyl ester. Ley and Zschacke. Ber., 57, 1700 (1924). 

 ,, ,, hydrochloride. Ley and Zschacke. Ber., 57, 1700 (1924). 



,, ,, sodium salt. Ley and Zschacke. Ber., 57, 1700 (1924). 



Piperonal. Purvis. Trans., 125, 406 (1924). 

 Piperonyl alcohol. Purvis. Trans., 125, 406 (1924). 

 Piperonylic acid. Purvis. Trans., 125, 406 (1924). 



PiperonyHdenecamphor. Haller and Lucas. Compt. rend., 178, 45 (1923). 

 Propionaldehyde. Schou. Compt. rend., 182, 965 (1926). 

 Propionylacetophenone. Tasaki. Acta Phytochim., 3, 259 (1927). 

 isoPropyl iodide. Stobbe and Schmitt. Zeit. wiss. Phot., 20, 57 (1921). 

 Protocotoin. Tasaki. Acta Phytochim., 2, 199 (1926). 

 Protopin. Kitasato. Acta Phytochim., 3, 175 (1927). 

 Pulegone. Purvis. Trans., 125, 406 (1924). 

 Pyrazine-2:3-dicarboxylic acid, ferrous salt. Ley, Schwarte and Munnich. Ber., 57, 



349 (1924). 

 Pyrazine-2:5-dicarboxylic acid. Ley, Schwarte and Munnich. Ber., 57, 349 (1924). 

 ,, „ sodium salt. Lev, Schwarte and Munnich. Ber., 



57,349(1924).' 

 Pyridine. Fischer and Steiner. Compt. rend., 175, 882 (1922). 

 Herrmann. Zeit. wiss. Phot., 18, 253 (1919). 

 Hiinecke. Ber., 60, 1451 (1927). 

 Y-Pyridone. Riegel and Reinhard. J. Amer. Chem. Soc, 48, 1334 (1926). 

 Pyrocatechol. Klingstedt. Compt. rend., 175, 365 (1922). 



Steiner. Compt. rend., 176, 744 (1923). 

 Pyrogallolcamphorein. Singh, Rai and Lai. Trans., 121, 1421 (1922). 

 Y-Pyrone. Riegel and Reinhard . J. Amer. Chem. Soc, 48, 1334 (1926). 

 Pyrrole. Korschun and Roll. Bull. Soc Chim., 33, 55 (1923). 

 ,, Rastelli and Mingozzi. Gazzetta, 55, 549 (1925). 



„ aldehyde. Rastelli and Mingozzi. Gazzetta, 55, 549 (1925). 

 Pyruvic acid. Fromageot. J. Chim. Phys., 24, 633 (1927). 



Henri and Fromageot. Bull. Soc. Chim., 37, 845 (1925). 

 Krethlow and Langbein. Ann. der Chemie, 423, 324 (1921). 

 „ phenylhydrazone. Stevens and Ward. Trans., 125, 1324 (1924). 

 ,, phenylmethylhydrazone. Stevens and Ward. Trans., 125, 1324 (1924). 



Q 



Quercetin. Shibata and Kimotsuki. Acta Phytochim., 1, 91 (1923). 



Tasaki. Acta Phytochim., 2, 119, 129 (1925) ; 3, 1 (1927). 

 (Synthetic). Tasaki. Acta Phytochim., 3, 315 (1927). 

 reduction product of . Tasaki. Acta Phytochim., 3, 1 (1927). 



