File:Intensive farming and use of dynamite (1911) (14735514426).jpg

Identifier: intensivefarming00penn (find matches)
Title: Intensive farming and use of dynamite
Year: 1911 (1910s)
Authors: Pennsylvania railroad company. (from old catalog)
Subjects: Explosives
Publisher: (Philadelphia, Pa.) The Pennsylvania railroad
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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etimesoverflowing farms and towns, and carrying away buildings andbridges. Dynamite is also of great service in starting log jams, breakingup rollways, etc., in the districts where timbering is carried on. BLASTING ICE Ice in streams sometimes forms jams or gorges 10 to 40 feethigh. When water backs up behind these, bridges may be carriedaway and other great damage and loss to the community result.All of this can be prevented at a small expense by the use of dyna-mite. To break up floating ice so that a gorge will not be formed,charges of dynamite should be exploded on the surface of the ice,the size of the charge depending on the thickness of the ice. If thefloating ice is in large sections, the work of blasting should be con-ducted on a broad, slow-running part of the stream, where it ispossible to get on to the ice either directly from the shore or inboats. Successive charges, consisting of a number of cartridges of40-per cent, dynamite, tied together in a bundle, should be laid 79
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PREPARING THE LAND FOR CROPS on the ice and exploded with fuse and blasting cap, until the iceis properly broken. When the streams are narrow, the charges ofexplosives may be thrown on to the ice from the shores or, if theice is running swiftly, the charges may be dropped on to the cakesfrom the down-stream side of bridges. The charge to be thrownon the floating ice should be prepared by tying securely togetherin a bundle the required number of cartridges, the cartridge in themiddle of the bundle having been primed with a blasting cap andwaterproof fuse. The place where the fuse enters the blasting capshould be well coated with soap or thick grease to keep water fromgetting into the blasting cap and damaging it. A block of wood,a stone, or some other object that would prevent its rolling shouldthen be tied to the charge, which, after the fuse is lighted, shouldbe thrown or dropped as nearly as possible on to the middle of theice cake. Particular attention must be given in this operati

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