330 C. M. Warren on a Process of Fractional Condensation. 
orig cool these vapors to the lowest limit of temperature 
ich the most volatile portion, under the circumstances, is able 
. ae and retain its vaporons condition. It will be seen ata 
o 
being forced to receive the vapors at the temperature which 
they he ape acquire in passing m the retort, an nd laden 
only apparatus, of which I have any knowledge, which can be regarded 
as benting any analog my own, is that employed in the rebsisiengiom of aleobolie 
spirits, on a manu aay scale, Ino one of the older forms of this apparatus, at 
of Solimani, to which m ny attention was first called by a friend, after my process 
na twelvementh, - temperature of a le; 
i ; 
iy common methods, The mode on construction of this apparatus 1s 
however only adapted to manufacturing purposes, and uf could not be utilized in 
the act i eso RS ha a in scientific research. Either on account 
os complication in, — some other cause, the apparatus of ashen has, I belie 
_ observing 
that ww the boiling-point of benzole is ee same of ale ohol ‘of sp. “gt. 0'826, 
ar the sum ractis 
usual manner,—by simple distillation. ever 
ta the belief. that no_ process of fractioning at all soalgous to mine a ied 
employe h, and that { am not in any way directly sides 
to ov of eo se of my predecessors, I rh cs aken no specia | pains to con vd of 
these devices in much detail. I may say, however, that I have found no reco 
ng the essential feature on which the superiority of Pref 
i bane a adapting it at once to both high and low temperatures, and for the most 
The einployiment of bulbs, above ee to, as proposed by Wurtz, is mane 
er the old process ulb apparatus furnishes foot mony 2 
most, lightly ose results ny a simple retort; being no 
lent to inereasing the height of the keg the retort itself, wislioil toe 
pespatbagects control over th y necuracy of the results; the only advantage e gained beings ' 
hese result ; 1 an: hat peers 
. 
