ood from Fig. 4 The ap- over the tank, and consists of a framework supporting supervision did so much to render the boats a success paratus consists essentially of a couple of electro- the shaft, on which is keyed a chain wheel, &, over at the Fair, where they carried 800,000 passengers, pro-… … tune ever heard of on the American continent. Go up Fig. 3. to the top of one of the tall down-town office buildings and look out across the roofs of the city. For block On the same shaft is a spurwheel, c, gear- after block and mile after mile can be seen hundreds ing with a pinion which runs…
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