It .'■9A/ 1 THE ADVOCATE OF INDUSTRY, AND JOURNAL OP SCIENTIFIC, MECHANICAL AND OTHER IMPROVEMENTS. [NUMBER 33. NEW-YORK, MAY 3, 1851. VOLUME 6.] allows the escape of backwater, and prevents CHAPMAN'S SPIRAL PADDLE WHEEL.—Figure 1. waterjlift. This paddle wheel was applied to Scientific) American,… … The following is the answer of one correspon- ties. If he does not regard the time lost in This paddle wheel for steamships and dent :— cumference of which is equal in diameter to fogs, and upon sand banks, his care for person- steamboats, is the invention of Abner Chap- " I tried the experiment of…
Patents · Water · Wheel · Planing · Railroad · Patent offioe · Iron · English patent · Carbonic acid · Wrought iron · Lower parts · Warm water
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