Mr. Cashman: We have them made at the hardware store, of sheet iron, with a cover. We put about two gallons of oil in this heater. There is a small piece of waste that is used as a wick, which we light from a torch. It will heat quite a large space sufficiently for two or three hours and prevent frost.
Mrs. Glenzke: Do you put a canvas over the tree or leave it uncovered?
Mr. Cashman: We do not put anything over the tree.
Mr. Stakman: What does your oil cost?
Mr. Cashman: About eight or nine cents a gallon.
Prof. Hansen: Just a thought occurred to me that out west on the Pacific coast where men have to get down to business in order to raise fruit they have these horticultural commissioners that have absolute police power to make orchard men clean up. They will come into your old orchard and pull it up and burn it and add it to your taxes, charge it up to you, if you don't clean up. The same sort of police power should prevail here. If a man has an old plum orchard that is diseased through and through, it won't do for him to tell his tale of woe year after year and not do anything. A county agent will come along and clean it up for him. After it is cleaned up it will be an easier proposition. If you are not going to keep up with the times and spray, then the county agent ought to have police power to burn the orchard. Either spray or go out of the plum business.
To Make Concentrated Apple Cider on a Commercial Scale.—The specialists of the fruit and vegetable utilization laboratory of the department have completed arrangements for a commercial test of the recently discovered method of concentrating apple cider by freezing and centrifugal methods. As a result, a cider mill in the Hood River Valley, Ore., will this fall undertake to manufacture and put on the retail market 1,000 gallons of concentrated cider, which will represent 5,000 gallons of ordinary apple cider with only the water removed.
The new method, it is believed, makes possible the concentrating of cider in such a way that it will keep better than raw cider, and also be so reduced in bulk that it can be shipped profitably long distances from the apple growing regions. The old attempts to concentrate cider by boiling have been failures because heat destroys the delicate flavor of cider. Under the new method nothing is taken from the cider but the water, and the resultant product is a thick liquid which contains all the apple-juice products and which can be restored to excellent sweet cider by the simple addition of four parts of water. The shippers and consumers, therefore, avoid paying freight on the water in ordinary cider. In addition, the product, when properly barreled, because of its higher amount of sugar, keeps better than raw cider, which quickly turns to vinegar.
The process, as described by the department's specialists, consists of freezing ordinary cider solid. The cider ice is then crushed and put into centrifugal machines such as are used in making cane sugar. When the cider ice is whirled rapidly the concentrated juice is thrown off and collected. The water remains in the machine as ice.