ICE HOUSES AND 



placing crystals of copper sulphate in a cloth sack hung to 

 a pole and trailed through the water until the salts are dis- 

 solved. One or two treatments during the season at the 

 rate of one pound of copper sulphate to 100,000 gallons of 

 water will be sufficient to render the water safe to use. 



In some cases a supply may be secrred as the ice is 

 going out in the spring, many miles fr^n where it was 

 formed. In the southern states floe ice, as this is called, is 

 the only possible natural source of supply. Ice of a fair 

 quality has been secured in this way at a small cost. 



In places where there are no large bodies of water, but 

 where the winters are cold enough, the can method of manu- 

 facturing may be used. This method requires a number of 

 large cans 22 inches square or 22x32 inches, and from 12 to 15 

 inches deep, of heavy galvanized iron or black iron properly 

 reinforced around the top with iron bands. The bottom 

 should be somewhat smaller than the top so that the cakes 

 may be easily removed and the danger of bursting lessened. 

 The cans are filled with fresh water and placed outdoors. 

 When a layer of ice 1^2 inches thick has formed over the 

 top the cans are turned bottom side up and the ice loosened 

 by pouring hot water over them. The thin sheet of ice 

 which formed at the bottom of the can (which is now the 

 top) should be broken and all the water except two or three 

 quarts poured out. When this is frozen a few more quarts 

 of water may be added and so on until a solid block of ice 

 is built up. By this method, using 25 cans, a supply of ice 

 may be manufactured in a short time and at a small expense. 

 The cans, if taken care of, will last for several years. Such 

 a supply of ice is pure and free from vegetable and animal 

 matter, which so often damage pond and river ice. 



HOW TO HARVEST ICE. 



The time and labor required to harvest the ice supply 

 will depend upon the equipment and upon the location and 

 condition of the field. Where ice is stored on the banks of 

 a lake or river and power machinery used, it has been put 

 up for three cents a ton. As ordinarily stored the cost will 

 range from 18 to 20 cents per ton, to which the cost of haul- 

 ing must be added. The equipment necessary for putting 

 up small quantities of ice is two saws, two ice tongs, two ice 

 hooks and a sharp pointed bar or spud. (See Fig. i.) 



Four 



