Note 56 — Chapter IX · STEAM COMMERCE OF THE GREAT LAKES.

The latest improvement in this direction is what is called the “Grain Sucker,” by which the process of loading and unloading cargoes of grain is accomplished with astonishing speed. The new appliance combines in its construction the main features of the ordinary elevator, and causes the grain to go through all the different movements above described, with this difference, that instead of the leg with the belt and bucket, the grain is elevated to the top of the structure on the principle of suction through a flexible pipe. The air being drawn off by pumps from the vacuum chamber, the grain is sucked up like water from a well. Machines of this kind, fitted with any number of these pipes that may be required, are used at the London docks, and are said to be capable of transferring wheat at the rate of a hundred and fifty tons an hour—Vide Strand Magazine for May, 1898.