other, there will be an intermittent stream of cooled air produced
thereby, of 60 degrees Fahrenheit, in an atmosphere of 90 degrees,
which may be led away in a pipe to the room desired to be cooled.'

The only difficulty to be encountered consists in the erection and
working of machinery. There can be little fear on this score. We have
no doubt that any London engine-maker would hit off the whole scheme
of an air-cooling machine in half an hour. What is wanted is a
forcing-pump wrought by a one horse or two bullock-power. This being
erected and wrought outside of a dwelling, the air will be forced into
a convolution of pipe passing through a tank of water, like the worm
of a still, and will issue by a check-valve at every stroke of the
piston into the apartments to be cooled. Properly arranged, and with a
suitable supply of water trickling through the tank, air at 90 degrees
will be reduced to 60 degrees or thereabouts, which is the temperature
of ordinary sitting-rooms in England. What, it may be asked, will be
the expense of such an apparatus for cooling the air of a
dwelling-house? We are informed that it will not be greater than that
usually paid for heating with fires in this country; and if so, the
expense cannot be considered a serious obstacle to the use of the
apparatus. In the case of barracks for soldiers, hospitals, and other
public establishments, the process will prove of such important
service, that the cost, even if greater than it is likely to be,
should present no obstacle to its application.




THE CHURCH OF THE CUP OF COLD WATER.