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safety lamp

(Encyclopedia)safety lamp, oil lamp designed for safe use in mines and other places where flammable gases such as firedamp (see damp) may be present. Its invention (c.1816) is usually attributed to Sir Humphry Davy...

Bowen, Elizabeth

(Encyclopedia)Bowen, Elizabeth bōˈĭn [key], 1899–1973, Anglo-Irish novelist, b. Dublin. In impeccable prose she treated love and frustration through studies of complex psychological relationships. Her novels i...

burn

(Encyclopedia)burn, injury resulting from exposure to heat, electricity, radiation, or caustic chemicals. Three degrees of burn are commonly recognized. In first-degree burns the outer layer of skin, called epiderm...

Kipling, Rudyard

(Encyclopedia)Kipling, Rudyard, 1865–1936, English author, b. Bombay (now Mumbai), India. Educated in England, Kipling returned to India in 1882 and worked as an editor on a Lahore paper. His early poems were col...

Higginson, Thomas Wentworth

(Encyclopedia)Higginson, Thomas Wentworth, 1823–1911, American author, b. Cambridge, Mass. A Unitarian minister, he was a leader in the abolitionist movement and was a member of a group that backed John Brown's a...

hydrazine

(Encyclopedia)hydrazine hīˈdrəzēnˌ [key], chemical compound, formula NH2NH2, m.p. 1.4℃, b.p. 113.5℃, specific gravity 1.011 at 15℃. It is very soluble in water and soluble in alcohol. At ordinary tempera...

denaturation

(Encyclopedia)denaturation, term used to describe the loss of native, higher-order structure of protein molecules in solution. Most globular proteins exhibit complicated three-dimensional folding described as secon...

chiropractic

(Encyclopedia)chiropractic kīrəprăkˈtĭk [key] [Gr.,=doing by hand], medical practice based on the theory that all disease results from a disruption of the functions of the nerves. The principal source of inter...

silica

(Encyclopedia)silica or silicon dioxide, chemical compound, SiO2. It is insoluble in water, slightly soluble in alkalies, and soluble in dilute hydrofluoric acid. Pure silica is colorless to white. It occurs in sev...

plasma

(Encyclopedia)plasma, in physics, fully ionized gas of low density, containing approximately equal numbers of positive and negative ions (see electron and ion). It is electrically conductive and is affected by magn...