270 Professor Davy’s Account of 
of the gas containing about one-tenth their bulk of water, which had been exposed 
last summer, during several weeks, in the open air, to light and the sun’s rays. 
2. Water recently saturated with chlorine in one bottle, was partly transferred to 
another bottle. On agitating the fluids in both bottles, and introducing the test, it 
instantly exploded. Similar experiments were made with a saturated solution of the 
gas which had been excluded from light for a month, and the results were precisely 
similar. 
3. Mixtures, both of pure and impure chlorine and hydrogene, being treated with 
the test, instant explosions took place, and the production of muriatic acid gas. 
4. On adding the tenth of a cubic inch of nitric acid to an equal bulk of muriatic 
acid, chlorine gas was presently evolved ; and the test, on being applied, repeatedly 
exploded. In cases where those acids were strong, and had acted for a short time on 
each other, it was only necessary to put the test on a slip of platina, and bring it to 
the mouth of the glass containing the acids, when an explosion took place, and the effect 
was produced several times. I found, indeed, that two drops of strong nitric, and 
one of muriatic acid, put into the same glass, produced a sufficient quantity of 
chlorine to explode the test several times. 
5. Nitric acid being added to common salt, both in its usual state of dryness and 
also after being fused, the gas evolved readily, and repeatedly exploded the test. 
The results were precisely similar, when nitric acid was added to a number of dry 
chlorides, as those of potassium, lime, iron, &c. and the test applied. 
6. Strong sulphuric acid was added to chloride of lime made above twelve months 
since; chlorine gas appeared to be evolved and the test exploded. Fluid chloride of 
magnesia made some time before, being treated with sulphuric acid, gas was disen- 
gaged which exploded the test. : 
7. A number of experiments were made to ascertain whether the power of the test 
would be injured or destroyed by diluting chlorine with other gases. Thus nitro- 
gene, nitrous oxide, nitrous gas and carbonic oxide gases were mixed in different pro- 
portions with chlorine, but in every instance the test exploded with great facility. 
When olefiant and carburetted hydrogene gases, were separately mixed with certain 
proportions of chlorine, the test simply exploded when brought in contact with the 
mixtures ; but when the same gases were severally mixed with chlorine in the pro- 
portions of about equal volumes of each, and the test applied, the mixed gases in- 
flamed the instant the test exploded, and the interior of the tube was completely 
blackened from the deposition of carbon. 
8. Different acid gases, as muriatic acid gas, nitrous acid gas, and carbonic acid gas, 
were separately mixed with chlorine gas, without any regard to proportions; but this 
circumstance neither prevented, or retarded in any degree, the action of the test, 
which instantly and repeatedly exploded on being dropped into the respective mix- 
tures. Even gases which are known to be rapidly acted on by chlorine, as sulphu- 
