182 Piercing of hot Iron by Sulphur. 
heuing pipes of two distinct manufactories in eve: the 
one of coal gas, and the other of oil gas. 
Specific gravity, 
Coal gas, - -4069 
2 Qil gasy oe - .9395 
When the flames were rendered aly luminous, the 
consumption, per hour, was, of 
Coal gas, iy - 4.85 cubic feet, ‘ 
Oil gas, - - - 1.37 dai ahs 
A gallon of clarified whale oil was found to produce 
more than 100 cubic feet of gas. 
Results, agreeing very nearly with the foregoing, were 
obtained by Phillips & Faraday. In two experiments with 
gas taken from different establishments, they found the 
spec. gray. and illuminating power as follows. 
Coal gas. Oil gas, 
ist } Spec. gravity, 4291 -9637 
‘Hluminating power, 1. 3.567 
Coal gas. Oil gas. 
od i Spec. grav. -4069 09395 
Illum. power, 1. 3.541 
3. Piercing of hot Iron by Sulphur.—Colonel Evasin, 
director of the Arsenal of Metz, in a letter to Gay eee 
states the following experiments. 
I placed a bar of wrought iron, about 16 millimetres in 
thickness, (,°; inch) into a common forge, fed. by fossil 
coal, and when it was welding hot | drew it out, and ap- 
plied to the surface a stick of sulphur 58, of an inch i in di- 
ameter. In 14 seconds the sulphur had pierced a hole 
through the iron, perfectly circular. Another bar of iron 
2 inches thick was pierced in 15 seconds. The holes had 
the exact form of the sticks of sulphur employed, whether 
cylindrical or prismatic. They were, however, more reg- 
ular on the side at which the sulphur came out, than on 
that to which it was applied. 
