The factory of the Georgia Ice Company, at Atlanta, has on the ground floor, a boiler 50 feet long and 4 1/2 feet in diameter, containing 150 feet of 3 1/2-inch pipe. The boiler is kept filled with aqua ammonia, which is separated by the steam heat into ammonia, gas, and water. The gas, leaving the water in the boiler, forces its way through a 6-inch pipe outside the building to the roof, three stories up, where it passes into 15,000 feet of coiled pipes, in which it is converted into liquid by cold water thrown over it in fountain jets. This liquid passes into 15,000 feet of three-quarter inch pipe, arranged in vertical sections 30 feet high and 3 feet apart, and its sudden liberation into these pipes turns the liquid pure ammonia into vapor, and the sudden expansion makes the pipes intensely cold. Now, above these hundreds of vertical pipes are innumerable little fountain jets throwing spray all over the pipes, the spray freezing gradually, forming an immense icicle of pure ice around each pipe. The gas next goes into 15,000 feet of absorbing pipe, and, being cooled by water running on the pipes, it is met by water forced into the pipes, and thus converted back into aqua ammonia, which goes into the big boiler, and is used over again. There is no waste, the same ammonia being used and reabsorbed any number of times. The water used for the spray is drawn from a well 75 feet deep, on the premises, and the large clocks of ice (which are loosened from the pipes by a little hot steam) come out pure and clear, and entirely free from any odor or ob-jectionable taste.

After the pipes have been stripped, about five weeks are required for a new lot of the requisite thickness to form. But, of course, the pipes are never all stripped at the same time, the ice towers being in all stages of formation. The factory has a capacity of 35 tons per day, but 20 tons keep pace with the demand, and it isn't stored, but cut every day as it is delivered, and it sells at from $10 to $12 per ton.