666 Scientific Proceedings, Royal Dublin Society.' 
Intercalated symmetrically-joined assemblages, of which one is liquid — 
while the other is linked into a continuous whole. Comparison 
to erystalloids’ and colloids. 
Of two assemblages which are mutually intercalated with con- 
gruent boundaries, in the way above described,’ it is conceivable 
that one may be liquid, 7.e., may be lying in small unlinked 
patches among patches of the other which are linked together, and 
this may have come about in one of the following two different 
ways :—(a) The assemblage which does not solidify may have 
reached a sufficiently tranquil homogeneous condition to enable it 
to fit in symmetrically with patches of the other assemblage, while 
the latter arranges itself more or less symmetrically as the con- 
ditions admit and solidifies, growing by accretion in the ordinary 
way ;° or (b) The solidification of both intercalated assemblages 
may take place as the mass grows, and liquefaction of one of them 
may be a subsequent occurrence. In either case a sponge-like 
structure is obtained.* 
If the two assemblages are isomorphous, so that in becoming 
intercalated they can each preserve their continuity of symmetrical 
arrangement, and present the same orientation of their corresponding 
structures, they will, like the more regular of the combinations 
above described, in which both constituent-assemblages are solid, 
have corresponding planes of particles sinularly orientated in the two 
assemblages. 
Since one of the constituents is liquid the mass will display 
some of the properties of a liquid,’ while the existence of the solid 
constituent will impart to it some of the characteristics of a 
solid. 
When from a mass thus constituted some of the tranquil liquid 
assemblage is, by degrees, abstracted, the solid skeleton framework 
1 See Note 1, p. 620. 2 See p. 649. 3 See p. 566. 
4 Since these pages were written the author’s attention has been directed to the 
experiments made by Biitschli, which support the view that substances which display 
imbibition have acellular or sponge-like structure. See O. Bitschli: ‘‘ Ueber den 
Bau quellbarer Kérper und die Bedingungen der Quellung.’’ Abhandl. der Gesellse. 
der Wiss. zu Gottingen, 1896. Bd. xt. 
5 Comp. p. 682. 
