REVERSE CURVE

Works on the basis that atoms of metallic and other particular elements emit light at characteristic wavelengths when they are excited in a flame, arc, or spark. Excited light is directed through an entrance slit in the spectrometer. This light penetrates the slit, falls on a grate, and is dispersed and reflected. The spectrometer is calibrated by a series of standard samples containing known amounts of the elements of interest. By exciting these standard samples, an analytical curve can be established which gives the relationship between the light intensity and its concentration in the fluid.

The plates forming the outer side and bottom skin of the hull

A wood placed in bottom of ship to keep cargo dry

The bottom ground of an anchorage. The expression is usually used with a modifying adjective to indicate the quality of the holding power of the material constituting the bottom

An open curve with two parts, all points of which have a constant difference in distance from two fixed points called FOCI.

The operation of an ion-exchange unit in which solutions are passed in at the bottom and out at the top of the container.

The forward curve of the stem of a ship

1. the lower edge of any sail. 2. the bottom of a mast. 3. a measurement of 12 inches.

An idiom for the bottom of the sea.

To clean a ship's bottom by burning off seaweed