C. M. Warren on the Volatile Hydrocarbons. 95 
the beautiful uniformity of the boiling-point difference through- 
out the series which he presented, and the apparent care with 
which the whole research had been conducted, led me to regard 
published, he took occasion to make analyses of his preparations 
of this substance, which he regards as “perfectly satisfactory ;” 
and adds that ‘‘the details and numerical results of these analy- 
ses, and of many others which the present inquiry necessitated, 
the limits and special object of the present paper do not admit 
ere,” 
of my giving here.” As he undertook to correct the work of 
correct, and those which had been previously publishec 
In addition to the bodies mentioned in the foregoing | table, 
spectively at 97° and 112°. Subsequently, in a “ Note on Para- 
benzole, x new Hydrocarbon from Goal-Naphtha,” * he publishes 
the details of an investigation of the former of these two bodies, 
which he finally found to boil “ perfectly constant at 97°°5,” and 
to be isomeric with benzole. ; 
I think I shall be able to show in the following pages,— 
1. That coal-tar naphtha contains only four hydrocarbons 
Within the range of 80° to 170°, as taught by Mansfield, and 
confirmed by Ritthausen. is 
° i ir on this subj 
10 Phileooph i peri 3 aay 1857, (a) aii, 415. 
Was 4 
