224 Proceedings of the Royal Society 
Most stable hydrate ] ^ 2(HCl + 16aq) .1111 
of chlorhydric acid, Mi ^ 
All molecules determined by hydrogen and sulphur are icosatoms, 
others very generally are dodecatoms. 
And so on, with between 70 and 80 familiar substances. 
Potass-soda felspar is a dodecatom of Potass felspar, viz. 
(KOAlA(SiO,),, 
in which in the two polar elements, KO is substituted by NaO ; 
occupying eight normal volumes as such highly composite molecules 
usually do. 
Theory. 
Abich. 
144 SiO, 
4300 
65*14 
65*72 ' 
Felspar 
24A1A 
1248 
18*82 
18*57 
From 
20 KO 
940 
14*17 
14*02 1 
Baveno. 
. 4NiO 
124 
1*25 
1*25 j 
X 
00 
II 
324)6632(2*55. The balance gives 2 5552. 
See Millar’s Miner. ^ p. 367. 
3. On the Freezing of the Egg of the Common Fowl. By 
John Davy, M.D., F.B.S. Bond, and Edin. 
The author, preparatory to stating the experiments which he has 
made on the freezing of the egg of the common fowl, referred to 
the early ones of Mr Hunter on the same subject, and to the later 
ones of Mr Paget, both these inquirers agreeing as to the results, 
but differing in their conclusions. Hunter attributing the resistance 
which the egg offers to freezing to a supposed vital principle, Mr 
Paget attributing it to the peculiar viscid state of the albumen. 
The author, from his results, infers that two causes are mainly 
operative in protecting the egg ; one, the cellular filamentous struc- 
ture in which the albumen is contained ; the other, the peculiar 
composition of the contents of the egg, and especially their saline 
elements. He concludes by proposing some queries respecting life, 
whether it can exist without action, and whether, provided the 
organic structure is not injured, congelation can take place without 
the death of the part frozen. 
