second story, but it need not be a large one, and pipes round a cotton
mill are plentiful. In the jar containing cotton the water has not
risen so high, there being not so much air to compress, and comes to
rest on the line, C. Now we have this simple condition to work from.
If the water has risen so as to occupy half of the space that has been
taken up by the amount of air in one jar, it must have done the same
in the other, and if it could have been carried to twice the extent in
volume would reach the bottom of the jar in the one containing nothing
but air, and to the line, H I, in the jar containing cotton.

The fibers then must have had an amount of material substance about
them to fill the remaining space entirely full, so that a particle of
air could not be taken into account anywhere. The cotton has produced
the same effect that a solid substance would do if it just filled the
space shown above the line, H I, for the water has risen into half the
space that is left below it. This enables an overseer to look into the
material substance of textile fibers by bringing into use the
elasticity of atmospheric air, reserving the liquid process for
measuring volume to govern the amount of compressibility.--_Boston
Journal of Commerce._

* * * * *




VOLUTE DOUBLE DISTILLING CONDENSER.


This distiller and condenser which we illustrate has been designed,