Pier 
- 
4 e 
Fe 
‘ scope of the well-known general laws of vapour pressure of F liquid 
15 c.c. are required therefor. The still-head 
-acork, oris groundin. Itconsistsofavapour = 
of small ‘amounts of freind ‘ibsnces he a ae 
be- ‘briefly referred to in the following review: — See se 
Ethyl ether, pure, 40.11 to 2.03 per cent. waters depression down to . a 
Bother “pro nar cost 1 OABS jy 2a nm ee egy EE 3 
Ether, PhiG. Vi. 4y, At Gee te: ae Pe OE aa ert Se NO a I > ne 
Ethyl ether, pure, +-0.23 3 1.73 ca (elas - alcohol: exaltation 
(iatioes ethyl ether + 1.15 percent. alcohol eg! B per cent. svater has the same. boiling 
Chlorofarm, * x: °.. iq 0839 to 2.63 pelcente alcohol: depression pec * 
” it water * : / Toney a 
Ethyl Bronte. one ay OO FEO, AOC ae an eee ue ee Cin yee 
SEAS ASE ee Ree MR URIBE 
Pedeaidchvas . . +0.22 to 0.69 5 ,, benzoic acid: depression. 
We supplement theabove statements | ; Le aaa 
insofar that air, either dissolved or intro- | en 
duced, may lead to an oticeable depression eet i 
of the boiling point. : 
In the course of their investigation, Paul Ra a 
and Schantz constructed the boiling point  * 
apparatus which combines Beckmann’s con- ay 
trivance with Kahlbaum’s still-head. Ilus- — 
tration and description are taken from Phen uN 
Condenser 
authors’ paper. . : 
A thick-walled test-tube of about 18% Cie yp! 
height and 20 mm. inside width serves as 7 
distilling flask. Tare garnets of 2 to 2.5mm. — 
diameter are filled in the tube about 3 cm. 
high, then a sufficient amount of the liquid : Reged 
under examination so that the surfaceex- = 
tends about 3.5cm.abovethegarnets;about 
f 
"Annular co 
Bade. 
is then fixed to the boilingtube by meansof i ws : 
tube of about 11mm. inner width and 23 cm. < i o Ret: 
eight, the Upp part of which is fused to, | aS 
