% 
, T. S. Hunt on Chemical Classification. 175 
two. ‘The reason of this will appear if we conceive the equiva- 
lents of the elements like those of their compounds, to be cape 
sented by 2 volumes; we have then, 
Oxygen, . 3 Pr; aw 
bak H, : ; 12. 
Chlo J) Oper, 52 449-0 am 
Hycehloric acid, : HCl | 
. H, O'« Be. 
Carbonic acid, O a ‘ 
“'The molecules of hau cei of onfortis wai Giscd all the 
diodides, are formed of two atoms which constitute a _homogene- 
ous combination, (HH), (C1 Cl), (MM), ete. ‘These in the pres- 
ence of each other can undergo a double poe i or mu- 
tual substitution and form a heterogeneous combinat 
“ (HH) +(Cl Cl)=(HCl)+(Cl H) 
| madiput Cl)=(MC1)+(Cl M). 
of hydrogen should be divisible by 4. In pert to explain ‘the’introduction of 
azote into organic bodies, I have been led to complete the rule o erhardt 
and to apply to azotized compounds the billowing scoiuligicn” ‘Ina otized 
substances, represented by 4 volumes, the sum of the atoms of hydrogen sche azote 
7 ee multi; 4.’ 
From this proposition the following corollaries are deducible 
Ist. if the hydrogen becomes 0, the number of the atoms of iia is a multiple 
Qd. If the srg becomes 0, the number of the atoms of hydrogen is a multiple 
of 4. 4 (Gerhard 
he organic substance contains phosphorus or arsenic in place of azote, 
he aed yale? is observed. 
pa abe halogen bodies (Cl, Br, I,) may bé ere forthe hydrogen, 
the sum of the azote, the hydrogen and the halog ee, is still a multiple ‘ras 
it results ae this that an organic substance canned combine with two, six or ten 
volumes of chlorine, bromine, etc. 
6th, ' The metals which form oxyds (R, O) vec age ag oer (H, 0), also 
replace hydrogen, and observe in Sheik combinations the 
6th. The metals of the oxyde, ‘ 3 in the cutinacy ilatioh), do no 
“In a notation which corres cmt to two Sota mes, the preceding be beet 
be divided by 2. On atcount of the simplicity of the for s,I give p 
with M. eas to this ac notation. Our two. propo itions ‘thes see faite 
the follow 
In all o orga ic substances, the sum of the dtoms of the hydrogen, eee , phospho- 
rus, arsenic, the metals and the halogen bodies, ought to be divisible by 2.” 
In regard to the truth of this law, it is to be rem ed that among hundreds 
of combinations re our position and equivalent is well determined, the 
a single exception, and that the few apparent ir prin rfl among the organic 
alkaloids, have rly all been explained by new and care ‘a conducted analy- 
ses, which have shown in thei ulas a pe ect confor 
i h corollary may be made to pile ae sixth, by a simple hypothesis, 
which M. Laurent has proposed in the Rerue — 3 corresponds 
to 3H, O, and consequently M, to Hg, it is cbvius spa and regarding 
the metals in these oxyds as uniting in two-third oar ry pie dey Se, 
they will no longer be exceptions, but will be included in the fifth 
this Journal for neg 1847.” (Review of Gerhar 
