A new Fulminating Silver. Q71 
retted by hydrogene and sulphureous acid gas, did not hinder the action of the test 
provided there was the slightest excess of chlorine present. 
9. Melted sulphur, and phosphorus were put into bottles of chlorine, and after the 
respective chlorides were formed, the test being repeatedly introduced into the bottles, 
in every instance, it exploded. 
10. The protoxide of chlorine was collected in an open tube, and a bit of the test 
introduced ; a double explosion took place; first of the test and then of the gas. 
The test being now added, it exploded as in a mixture of chlorine and oxygene. The 
peroxide of chlorine being treated with the test, a much louder explosion took place 
than in the foregoing experiment. 
11. A number of experiments were made to ascertain whether the vapours of dif- 
ferent fluids diffused through chlorine gas would prevent the usual action of the test. 
The chlorine gas was agitated in contact with water heated nearly to the boiling point, 
and whilst the hot vapour issued from the bottle, the test was several times applied, 
and in every trial it instantly exploded. 
12. Sulphuric ether was put into a bottle of chlorine gas, and agitated ; a bit of 
the test being now added, it exploded; inflammation took place, and carbonaceous 
matter was deposited on the sides of the bottle. A similar experiment being made 
with alcohol, the test exploded several times. 
13. A few drops of oil of turpentine and of naphtha were separately put into 
phials of chlorine gas, a rapid action of course took place, and much heat was pro- 
duced. ‘The test, on being instantly applied, exploded in both phials; but if a short 
interval was suffered to elapse, and the fluids were agitated, the chlorine was all ab- 
sorbed and no effect was produced on the test. 
14. Strong muriatic, nitric, acetic, and hydrocyanic acids, were separately put into 
phials of chlorine gas and agitated ; the test being repeatedly applied to all the phials, 
exploded in every instance. ‘The test did not explode in any of those acids, or their 
Tespective vapours: nor in aqua regia, but when the deep orange aqua regia was agi- 
tated, a compound of chlorine was evolved from it which readily exploded the test. 
15. Well stopped bottles containing Thomson’s chloro-chromic acid, and chloride 
of sulphur, which had been made a considerable time, were opened, and the test being 
applied, it exploded repeatedly before it reached the fluids. In both fluids there 
seemed to be a partial decomposition. ‘The chloro-chromic acid had a very strong 
odour of chlorine, and the gas in the bottle continued for some time to explode the 
test. On opening the bottle of chloride of sulphur, a quantity of the vapour and 
some of the fluid were forcibly expelled. 
16. Being desirous of ascertaining to what extent common air might be mixed with 
chlorine gas, without impairing the action of the test, I made a number of experi- 
ments, using different proportions of chlorine and common air ; in all of which the 
test readily exploded. I then collected in a cubic-inch measure divided into 100 
VOL. XVII. 31 
