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Show Tree Planting by Dynamite. HolcB for tree planting, according to tho Engineering Record, huvo been excavuted by tho Long Island railway by blasting with dynamite. A hole about two foot deep waB first dug with a post-holo auger at an angle of about thirty-five degrees with tho Burfaco, and loaded with half a stick of 10 per cent, dynnmlto. TIiIh shot mnkcH a hole about two feet (loop und three feut In dlamoter, leaving the onrth in the bottom pulverized pul-verized suitably for rhmtlng. It Is stated that two men can limn exenvnto 250 holos In a ton-hour day at a cost of about 7 cents a holo. |