1080 
pure. This substance swells strongly at room temperature in 
98 °/, ethylaleohol, without being solved to any considerable degree ; 
placed in saturated aleohol vapour at the same temperature, it loses 
a great part of the absorbed alechol. 
Celloidin in ethylaleohol. 
le De 
Weight of dry substance 0.774 Gr. Weight of dry substance 0.561 Gr. 
In liquid In vapour 
after 2 days 4.591 Gr. after 2 days 0.806 Gr. 
sol isis |e ety yeaa ee Pa a Oe IL 
ie Liisa pean ae Rn RORE 
Composition of the gel 14.3 °/, cell. ARS rr OTE 
Then in vapour td ed AO 
after 2 days 5.139 Gr. Composition: 52.9 °/, celloidin 
eames: PAD E10 OEL Then in liquid 
breede 5 after 2 days 3.270 Gr. 
EO ADO ay EN DANE el 
i Os ens er ADE Ned ee CoO ante 
16? Gaga es Composition: 16.5 °/, cell. 
IS amen are.) Ba This quantity, now once more 
Sashes ke EOE ses placed in saturated vapour, 
Bey bs Fe Faes A DD lost weight as in exper. I. 
Weight in equilibrium, calculated from 
experiment II, 1.601 Gr. 
It was noticed, that, when the swollen celloidin, taken from the 
liquid and well dried off, was placed in the vapour, a few drops of 
aleohol were found after some days on the bottom of the weighing- 
bottle; these were removed before weighing. 
Celloidin also shows the phenomenon in methylaleohol; the absorp- 
tion in liquid, as well as the loss in vapour are nearly equal to 
those in ethylaleohol. It was also found with rubber (‘gummi elas- 
ticum’” Ph. Ned. IV) in xylene and in chloroform. In these systems 
a difficulty presented itself viz. that the swollen rubber almost 
became liquid; we succeeded in separating it from the xylene or 
chloroform by centrifuging. Rubber is more solubie in these liquids 
than the other substances investigated are in water or alcohol, but 
that does not decrease thé results of our experiments. 
Laminaria and cornea of the ox show the phenomenon quite 
clearly in water; from the latter, though well dried after being 
taken out of the liquid, big drops were found on the bottom of the 
