one, as it rose above it on compression.  Thus the air, being at 90 degrees, will rise, if compressed to a certain quantity, to 120 degrees; if it be kept in this compressed and confined state until all the extra 30 degrees of heat have been conveyed away by radiation and conduction, and the air be then allowed to escape, it will be found, on issuing, to be of 60 degrees of temperature.  If a cooler be formed by a pipe under water, and air be forced in under a given compression at one end, and be made to pass along to the other, it may thereby, if the cooler be sufficiently extensive, be robbed of all its heat of compression; and if the apparatus is so arranged, as it easily may be, that at every stroke of the pump forcing in air at one end of the pipe, an equivalent quantity of the cooled compressed air escape from under a loaded valve at the 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.

One beautiful evening, in the year 1815, the parish priest of San Pietro, a village a few miles distant from Sevilla, returned much fatigued to his little cottage, where he found his aged housekeeper, the Senora Margarita, watching for him.  Notwithstanding that one is well accustomed to the sight of poverty in Spain, it was impossible to help being struck by the utter destitution which appeared in the house of the good priest; the more so, as every imaginable contrivance had been resorted to, to hide the nakedness