Columbia Encyclopedia

(Encyclopedia) Brussels griffon, breed of sturdy toy dog developed in Belgium in the 18th and 19th cent. It stands about 8 in. (20.3 cm) high at the shoulder and weighs from 6 to 12 lb (2.7–5.5 kg). There are two ...

(Encyclopedia) bulldog, breed of thick-set nonsporting dog developed in the British Isles many centuries ago. It stands from 13 to 15 in. (33–38.1 cm) high at the shoulder and weighs from 40 to 50 lb (18.1–22.7 ...

(Encyclopedia) English toy spaniel, breed of toy dog perfected in England over many centuries. It stands about 10 in. (25 cm) high at the shoulder and weighs from 9 to 12 lb (4–5 kg). Its long, silky coat is soft ...

(Encyclopedia) ergonomics, the engineering science concerned with the physical and psychological relationship between machines and the people who use them. The ergonomicist takes an empirical approach to the study o...

(Encyclopedia) German shepherd, breed of large, muscular working dog perfected in Germany at the turn of the 20th cent. It stands about 25 in. (64 cm) high at the shoulder and weighs from 60 to 85 lb (27.2–38.5 kg...

(Encyclopedia) French bulldog, breed of small, alert nonsporting dog with batlike ears, developed in France in the second half of the 19th cent. It stands about 12 in. (30.4 cm) high at the shoulder and weighs from ...

(Encyclopedia) diamond, mineral, one of two crystalline forms of the element carbon (see allotropy), the hardest natural substance known, used as a gem and in industry. The discoveries of 1870–71 in South Africa...

(Encyclopedia) glass, hard substance, usually brittle and transparent, composed chiefly of silicates and an alkali fused at high temperature. Glass has become invaluable in modern architecture, illumination, elect...

(Encyclopedia) chalcedony kălsĕdˈənē [key] [from Chalcedon], form of quartz the crystals of which are so minute that its crystalline structure cannot be seen except with the aid of a microscope. Chalcedony has ...

(Encyclopedia) Limousin or Limosin, Léonard lāônärˈ lēmo͞ozăNˈ, lēmôzăNˈ [key], c.1505–c.1577, French painter in enamel, most celebrated member of a family of Limoges enamel artists. His earliest auth...