Hydrogen.
5. Oxygen Carbonic acid.
7. Oxygen Olefiant gas.
8. Oxygen Nitrous gas.
9. Oxygen Sulphurous acid.
10. Oxygen Ammonia.
11. Hydrogen Carbonic acid.
12 Hydrogen Olefiant gas.
13. Hydrogen Sulphurous acid.
14. Hydrogen Fluo-silicic acid.
15. Hydrogen Ammonia.
16, Hydrogen Arseniuretted hydrogen.
17. Hydrogen Sulphuretted hydrogen.
18, Nitrogen Olefiant gas.
19. Nitrogen Nitrous gas.
20. Nitrogen Nitrous oxide.
21. Nitrogen Ammonia.
22. Carbonic oxide Carbonic acid.
23. Carbonic oxide Olefiant gas.
24. Nitrous oxide Nitrous gas.
25. Ammonia Sulphurous acid.

1292. Notwithstanding the striking contrasts of all kinds which these gases
present of property, of density, whether simple or compound, anions or
cations (665.), of high or low pressure (1284. 1286.), hot or cold (1288.),
not the least difference in their capacity to favour or admit electrical
induction through them could be perceived. Considering the point
established, that in all these gases induction takes place by an action of
contiguous particles, this is the more important, and adds one to the many
striking relations which hold between bodies having the gaseous condition
and form. Another equally important electrical relation, which will be
examined in the next paper[A], is that which the different gases have to
each other at the _same pressure_ of causing the retention of the _same or
different degrees of charge_ upon conductors in them. These two results
appear to bear importantly upon the subject of electrochemical excitation
and decomposition; for as _all_ these phenomena, different as they seem to
be, must depend upon the electrical forces of the particles of matter, the
very distance at which they seem to stand from each other will do much, if
properly considered, to illustrate the principle by which they are held in
one common bond, and subject, as they must be, to one common law.

[A] See in relation to this point 1382. &c.--_Dec. 1838._

1293. It is just possible that the gases may differ from each other in
their specific inductive capacity, and yet by quantities so small as not to
be distinguished in the apparatus I have used. It must be remembered,
however, that in the gaseous experiments the gases occupy