The f'. plant" for handling the cylinders and the excavator is fully shown on the plan. It was erected upon t.wo wooden barges, each 60x24 feet, secured together at one end so as to leave a space of 9 feet between tbem; the engine was WR� . As remarked before, the excavating apparatus is a modifi cation of the Milroy excavator, used in England and India, but more compact and simple in its action tban its English prototype. Tbe capacity of the full bucket is. two-thirds of a cubic yard. Its

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... al appearance is illustrated by the plans shown. Describing its working from an inspection of tbe drawings merely, as we understand them, it is as fol lows: The excavator is provided with two chains, one se cured to the eye-bolt in toj) of the castiug, D, tbe otber, pass ing tbrough D and around a series of rollers or shears, as sbown on ,. Side View of Castings," is fastened to the lower casting, E. The hoisting engine has two drums, by which these cbains can be manipnlated independently. The six arms carrying the bucket-sections are secured by pins to the lower casting, E, and are so connected to the upper casting,