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Address American average balloon better body bricks building built carried cents Chicago color comes complete construction contains Correspondence cost coupon course direct effect electricity Engineer expense experiments fact feet fish five four give guarantee half heat herd hold hour hundred inches interest invention iron keep knowledge known less light machine Magazine material means methods miles milk month motor offer Office operation pass Patent photograph plant plate position posts pounds practical pressure produced profit ready record road salmon School secure speed stand success supply surface taken Technical World Magazine thousands tion trains turn wire World Write York