is an account of the sounding-apparatus of Lieutenant E. B. Hunt: Arrange a weighted india-rubber air-vessel for dragging on the bottom; connect this with a boat or surveying-vessel by an air-tight tube of small bore; let this tube open in a cistern of mercury made air-tight; and from this cistern arrange a vertical glass column, open at the top, through which the mercury can rise to any hight required by the pressure due to the depth.
See also Ericsson's patent, September 22, 1863.
Also McCord's, September 20, 1859, in which latter the pressure of the water pushes up a piston into a graduated cylinder, where the acquired elevation is registered.
One in which liquid fuel is used beneath a steam-boiler, cooking-vessel, or otherwise.
It usually has a jet of air or steam, frequently both, which carry with them a quantity of petroleum or coal oil in the form of spray which is ignited and burns below the boiler.
Ingenuity is exercised in so arranging the <