LENS n.
curved and the other plane, and commonly used, either singly or combined, in optical instruments, for changing the direction of rays of light, and thus magnifying objects, or otherwise modifying vision. In practice, the curved surfaces are usually spherical, though rarely cylindrical, or of some other figure. Lenses…
LETTER n.
e end, used in making the matrices for type. -- Letters of administration (Law), the instrument by which an administrator or administratrix is authorized to administer the goods and estate of a deceased person. -- Letter of attorney, Letter of credit, etc. See under Attorney, Credit, etc. -- Letter of license, a pap…
LEVELING n.
The art or operation of using a leveling instrument for finding a horizontal line, for ascertaining the differences of level between different points of the earth's surface included in a survey, for establishing grades, etc., as in finding the descent of a river, or locating a line of railroad. Leveling instrument. See…