49 
first distillation, it will be by transferring back the distillate 
to the retort and again distilling to dryness; a minute 
quantity of high boiling residue will then be obtained, 
raising the temperature towards 300° C. 
A quantity of the pure substance, submitted to organic 
analysis, furnished the following numbers : — 
Grans. 
I. 0-1240 grm. of substance gave 0-4307 C0 2 
II. 0-1237 „ 
5> 
and 0-0624 H,0. 
0-4284 C0 2 
0-0626 H,0. 
I. 
II. 
Calculated for 
c 10 h 7 1 
C 10 H 7 / 
Carbon 
Hydrogen 
. 94-72 
5-59 
94-46 
5-62 
94-49 
5-51 
100-31 
100-08 
100-00 
The hydrogen evolved in the process was collected and 
measured, and the following calculation made : — 
Weight of Naplithalin converted, 26-30 grms. (nearly). 
Volume of Hydrogen at 0° C = 2359-7 cbc. 
9KR 2 = 0-2107 grm. H. 
2C i 0 H 8 = £ 10 ^ | + H 2 . 26-3 grms. lose 0-2055 grm. H. 
Hydrogen actually liberated = 0-2107 grm. 
„ calculated as above =0-2055 grm. 
For the formuala 7C 10 H 8 = 5C I4 H 10 + 6H = 0*1861 grm. of H. 
must be liberated. 
From these considerations, and seeing that the properties 
of the body considerably differ from those of Di-naphthyl as 
obtained by *Dr. F. Lossen, I propose to regard this body as 
an Isomer, and propose to name it accordingly Iso-di- 
naphthyl. 
Prestolee Alkali Works, near Manchester, 
November 29, 1870. 
* Ann. der Chemie void P ha ran. : Band cxliv. 71, 1867. 
