Bryan, A: Maple-Sap Sirup -

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Résumé :
Excerpt from Maple-Sap Sirup: Its Manufacture, Composition, and Effect of Environment Thereon

The tree is tapped generally by boring a clean-cut hole from three eighths to half an inch in diameter and about 1 to 3 inches deep, according to the size of the tree. After cleaning the hole, a suitable spile or metal spout is driven in tightly so as to prevent leaking and a bucket is attached to catch the sap. The tapping is done just before the approach of spring so as to obtain the earliest run of sap. The side of the tree to be tapped, the height of the hole above the ground, and the number of holes to a tree are points that have been much discussed. Jones, Edson, and Morse have studied these ques tions thoroughly as well as the subject of maple-sap ?ow and have published their results in Bulletin 103 of the Vermont Agricultural Experiment Station. A discussion of the care of a maple grove by Fox and Hubbard is given in Bulletin 59 of the Bureau of Forestry, Depart ment of Agriculture.

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