Gn = eG! Bees pe a [ag ae ee ae ee 
etamertemien weet 
T. A, Edison—Resonant Tuning Fork. 395 
on top of the gas, until the pressure of the confined gas becomes 
following heights: 108, 132, 120 and 188 feet. The columns 
are composed of mingled water and gas, the latter being readily 
ignited. After night-fall the spectacle is grand. The antago- 
nistic elements of fire and water are so promiscuously blended, 
that each seems to be fighting for the mastery. At one 
moment the flame is almost entirely extinguished, only to burst 
forth at the next instant with increased energy and greater 
brilliancy. During sunshine the sprays form an artificial rain- 
w, and in winter the columns became incased in huge trans- 
parent ice chimneys. 
A number of wells in the oil regions have thrown water 
geysers similar to the Kane well, but none have ever attracted 
such attention. 
As early as 1838 a salt well, drilled in the valley of the Ohio, 
threw columns of water and gas, at intervals of ten to twelve 
hours, to heights varying from fifty to one hundred feet. This 
well is possibly the first of the ‘ water and gas geyser wells. 
Arr. XLVIII.—On a Resonant Tuning Fork; by THomMas A. 
Epison, Ph.D., Menlo Park, N. J. 
[Read at the Saratoga meeting of the American Association.] 
lan, by which the box is dispensed with, the resonant cham- 
er, as is shown in the cut, being formed by the prongs them- 
selves. To make the fork, a thick tube of bell-metal, one end 
of which is closed, has a slit sawed longitudinally through its 
