Bit diuboratory Qccurrences.” 
tated, but was less abundant in eb rt than usual. Re- 
sites the experiment, in the same manner, the gases had 
remained in contact a few alae; apparently without ming- 
ling much except at their surfaces—the chlorine preserving 
its peculiar colour and the other gas its colourless transpa~ 
rency, when, suddenly, a bright flash pervaded the bell glass, 
which was of the capacity of five or six quarts; it was raised 
out of the water with a slight report—a dense deposit of char- 
coal lined the glass and floated on the water of the cistern, 
the chlorine disappeared. The appearances were much 
ike those which are exhibited when a rag dipped in oil of 
tu tine is placed in a jar of chlorine gas. 
flecting on the circumstances, I was led to believe that 
the peculiar effect, in this case, arose from the fact, that, 
owing to the great difference in the specific gravity of the two 
gases, the action took place principally at the two. 
of contact and thus the chlorine acting upon a comparatively 
thin stratum of inflammable gas, the two became so heated, 
as to pass into vivid combustion. Every new occurrence in 
practical chemistry, which may involve danger, ought to be 
exactly See’ that we may =~ aware of pease ns aio 
otherwise antic anticipated. ; : 
fe: & ee nyt es ‘2 osit of P - 
"A preparation of this substance, mpl, toon rade; was 
left eight or ten days well corked, in iron tubes, (the same in 
which it ‘was prepared,) and being opened, for transferring 
to another vessel, a common ramrod was introduced, te 
loosen the pyrophorus, the motion of which, uced: 
considerable friction ; when an explosion took place, loud as 
a common musket, by which the contents of the tube were 
blown out in a jet of fire, two or three feet long, scorchit 
the hair and eye-brows of the person conducting the oj 
tion, and a violent jerk was given to the hand that he 
ramrod, ane glove, with which his hand was tovtainetely 
as burnt in several places to a crisp. His eyes. 
and whole ae were affected in the same manner as if gun 
¥ en discharged against them ; and this sensa- 
tion coutnied several days, passing off, however, without 
inconvenience. On putting the ramrod into a second 
tube, containing pyrophorus, and very sence 5 and gently 
tou uching the substance with the end of the rod, another ex- 
vlesion tack place. equally violent as the first. It was not 
