t. Martin’s-le-Grand and one of the invention consists in propelling a train of car- tube, and at the lower angles on either side, are cast of the district post offices, and ultimately to extend riages‘ through a tube by the creation of a vacuum raised ledges, two inches wide:on the: top, and one… … wheels of the despatch trucks to run upon. The latter and the carriages the piston. A piece of ground Some successful experiments were made on Tuesday. One trip was made in sixty seconds, and a second in are made of a framing seven or eight feet long, in- adjoining the Victoria Railway bridge at…
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