A Dictionary of Arts: L. Laccic acid. Laccine. Lacquer. Lamium album. Lazulite. Ledum palustre. Litharge. Luteoline.

A Dictionary of Arts, Manufactures, and Mines; containing A Clear Exposition of Their Principles and Practice

by Andrew Ure, M. D.;
F. R. S. M. G. S. Lond.: M. Acad. M. S. Philad.; S. PH. DOC. N. GERM. Ranow.; Mulh. Etc. Etc.

Illustrated with nearly fifteen hundred engravings on wood
Eleventh American, From The Last London Edition.
To which is appended, a Supplement of Recent Improvements to The Present Time.

New York: D Appleton & company, 200 Broadway. Philadelphia: George S. Appleton, 148 Chestnut St.


LACCIC ACID crystallizes, has a wine yellow colour, a sour taste, is soluble in water, alcohol, and ether. It was extracted from stick lac by Dr. John.

LACCINE is the portion of shell lac which is insoluble in boiling alcohol. It is brown, brittle, translucid, consisting of agglomerated pellicles, more like a resin than any thing else. It is insoluble in ether and oils. It has not been applied to any use.

LACQUER is a varnish consisting chiefly of a solution of pale shell-lac in alcohol, tinged with saffron, annotto, or other colouring matters. See VARNISH.

LAMIUM ALBUM, or thedead nettle, is said by Leuchs to afford in its leaves a greenish-yellow dye. The L. purpureum dyes a reddish-grey with salt of tin, and a greenish tint with iron liquor.

LAZULITE (Eng. and Fr.; Lazulith, Germ.) is a blue vitreous mineral crystallizing in rhomboidal dodecahedrons; spec. grav. 2.76 to 2.94; scratches glass; affords a little water by calcination; fusible into a white glass; dissolves in acids with loss of colour; solution leaves an alkaline residuum, after being treated with carbonate of ammonia, filtered, evaporated, and calcined. It consists of silica 35.8; alumina 34.8; soda 23.2; sulphur 3.1; carbonate of lime 3.1. This beautiful stone affords the native ultramarine pigment, which was very costly till a mode of making it artificially was lately discovered. See ULTRAMARINE.

LEDUM PALUSTRE. This plant is employed in Russia to tan the skins of goats, calves, and sheep, into a reddish leather of an agreeable smell; as also in the preparation of the oil of birch, for making what is commonly called Russia leather.

LITHARGE (Eng. and Fr.; Glätte, Germ.) is the fused yellow protoxide of lead, which on cooling passes into a mass consisting of small six-sided plates, of a reddish yellow colour and semitransparent. It generally contains more or less red lead, whence the variations of its colour; and carbonic acid, especially when it has been exposed to the air for some time. See LEAD, and SILVER, for its mode of preparation.

LUTEOLINE, is a yellow colouring matter discovered by Chevreul in weld. When sublimed, it crystallizes in needles.

Ei kommentteja :