Lavender

(lav'-en-der). The flowers of Lavandula vera, having properties due to a volatile oil. It is aromatic, stimulant, and carminative, but is used mainly as a flavor and as an adjuvant to other medicines. Lavandulae, Ol., the volatile oil distilled from the whole herb. Dose A constituent of Spt. odoratus. L., Spirit of, 5 parts of the oil Colles', a child born of a mother who is without obvious venereal symptoms, and which, without being exposed to any infection subsequent to its birth, presents symptoms of syphilis when a few weeks old, can infect the most healthy nurse, whether she suckle it or merely handle and dre it, while it will not infect its own mother, even though she suckle it while it has venereal ulcers of the lips and tongue. L. of Contemporaneous Transmi ion, changes in an individual appear at the same time as they appeared in its ancestor. L., Coulomb's, the force of attraction or repulsion between two charges of electricity is proportional to the quantity of electricity acting, and inversely proportional to the Degeneration. L., Berthollet's, when two salts in solution can by double decomposition produce a salt le soluble than either, this salt will be produced. those refracted. L., Charles's, equal increments of temperature add equal amounts to the product of the volume and pre ure of a given ma of gas. The increase is of its volume measured at 2730 C, which is the zero of absolute temperature. L., square of the distance between them. L., Dalton's, or L., Dalton-Henry's, although the volume of a gas absorbed by a liquid remains constant, the weight (volume multiplied by the density) of the absorbed gas rises and falls in to its pre ure. L. of Definite Proportions, when two or more chemic substances unite to form a compound, they do so in a fixed and constant proportion. L., Delbceuf's, a congenital variation of a number of individuals in a species, if not advantageous or injurious, and if not balanced by reversion, will produce a variety, the proportion of which to the whole species tends to reach equality. L. of Diffusion of Gases through Membranes. See L., Graham'' s. L. Donders'. See L., Listing's. L., Dulong and Petit's, the products of the specific heat of elements in the solid state multiplied by their atomic weights are (approximately) the same; i. e.