Ee eee 1k ae ee ee ae re MEN es Ee EN See) ON aS Lae ae Sa Bee AS 
on Photogenic or Hydrocarbon-Oils from Coal. 263 
“These products ist the ory distillation of coal] are somewhat analogous 
to =e derived from wood, and some are identical with them e 
liquid products consist Sof various bodies sai allied to me and the 
_ Nuphthali me and Parafline. The relative proportions of these products 
with the temperature. The lower the heat “ps yy the less gas, and 
gher 
er h has 
been cited by Dr. Antisell (p. 14), fr whom we quote it: “So remained par- 
affine until this hour [date of Y.’s pinto a beautiful item in the ‘rolleetion of 
son preparations ; but it has never escaped from the rooms of the scien- 
pon the reader sles has followed us thus far we need not nae that the 
oe statement is incorrect. As an offset to it we cite the follo 
D 
Bituminous shale, then fluid bitumen [crude oil], mineral grease, crude an 
refined (the former at 50 fr. the 100 kilog. [= ape 00 per 100 Ibs.]}, also mine- 
ral war [para ffine] chee oo refined (the former at 125 fr., the latter at 180 5% 
[= respectively 123 and Abpea: per 100 Ibs s)) The purified mineral w 
was beautifully white Bt: the candles made of it had a soiled apyearnsiee.” 
ermann (now, according He Wigner councillor of State in Munich goes) 
on to assert that “if these fatty products can be prog economically they 
belong to the most important objects of the si ies 
Tt would be ke 4 to our purpose were we t empt to o trace the rece 
During the nite ‘fw years a large number of mers on the pian ae odie been 
i i while i ie wie 
"pon the materials used for producing li he have cash devoted a separa 
spect to its description. A ow w spec welt tee 4 tises have also been published 
an * ha following is a, doubtless very Teapot e, list—§ 
TH, Ed. Handbuch der Photogen- und Parafin- Fabrtkation aus 
Ti Braunkohe und bituminésem aoe nach den neuesten Versuchen und 
— = Quedlinburg, Basse, 1858. 
Carl, Georg, Die trockene Destillation und die hauptsdchlichsten 
ria brent en Hiss eae Leipzig, Barth, 1858. 
xt, Merrzenporrr und Wernecke. [Committee of the on dl 
debury: Gre Sicercicc] Ueber das Photogen oder Mineralel, so we 
—— 
* Erdmann’s J 1 fi ktische Chemie, lxiii, 63, Did our space allow, we 
Would gladly transcribe the wh de ie of this article —an English translation of which 
: f coal- 
proof of a 8s that the present widely-spread manufacture o 
: Hey cn is mainly due to the aonesalively recent discovery of rich stores 
ighly bituminous substances. 
t From v, He ermann’s tg Industrie Ausstellung Zu Paris im Jahre, 1839, ads 
: ery complete a es of these may be found in Wagner's oy teases 
umes of ce te thus far been published. For i hee to Lat ~~ 
@ scienti searches of GREVILLE WILLIAMS, 
have been chiefly. contin hosiansine to the more volatile portions of the ofl her to 
i¢ compounds which occur in it, see Liebig and Kopp’s Jahresbericht 
§ Small as this eh is, it will nevertheless recall to the mind of the cage the 
ést lines with which Dr. Antisell’s preface commences, namely these : 
et il treatise i is the first pub blished monograph on the art of distilling oils 
rals co: ntai en,” 
