596 



In tlie following paper we tlierefore puhlisli the measurements 

 made witli 36 position-isomeric substances: ortko-, vwtn-, and 

 1)0 IK- Dinitrobenzene ; meta-, and parn-Flnoronitrohenztme ; ortko-, meta-, 

 and parn-Chloronitrohenzene ; meta-''), and j)(irn-Di.chlorobeii.zene\ 

 -1-2-4, 1-3-4- and l-4:2-Dic/iJo)vnitivbenzenes; ortko-, ineto-, and para- 

 Bromonitrohenzcne ; ortko-, and metd-Jodonitrobenzene ; ortko-"), and 

 para-Nitrotoluenn; ortko-, meta-, and para-Nltroplienol; or tko- ^), di,né 

 para-Nitroanm>l; ortko-, and para-Cresol ; ortko-, and para-Ckloro- 

 nniline; meta-, and para-Nitroaniliiu; S-Nitro-, and 5-Nitro-ortho- 

 Toluidine, and 'S-Nitro-/)arii-Tobiïdine : and finally the cjdic derivatives: 

 sylvestrene and terebene. 



The purification of these compounds, as well as the determination 

 of the density, occurred in the same way as formerly described. In 

 the case of some compounds evaporating rapidly already ai the 

 mellingpoint. these determinations could not be made with satisfactory 

 exactitude. 



§ 2. 



1) F. M. Jaeger, these Proceedings, 23, 411, (1914). 



2) F. M. Jaeger and M. J. Smit. these Proceedings, 23, 387, (1914) 

 ?) F. M. Jaeger and Jul. Kahn, ibidem, 23. 400, (1914). 



