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sawmill

(Encyclopedia) sawmill, installation or facility in which cut logs are sawed into standard-sized boards and timbers. The saws used in such an installation are generally of three types: the circular…

papyrus

(Encyclopedia) papyruspapyruspəpīˈrəs [key], a sedge (Cyperus papyrus), now almost extinct in Egypt but so universally used there in antiquity as to be the hieroglyphic symbol for Lower Egypt and a…

sandstone

(Encyclopedia) sandstone, sedimentary rock formed by the cementing together of grains of sand. The usual cementing material in sandstone is calcium carbonate, iron oxides, or silica, and the hardness…

Nervi, Pier Luigi

(Encyclopedia) Nervi, Pier LuigiNervi, Pier Luigipyĕr lw&oomacr;ēˈjē nĕrˈvē [key], 1891–1979, Italian architectural engineer. Nervi is considered one of the foremost European architectural…

Jastrow, Marcus

(Encyclopedia) Jastrow, MarcusJastrow, Marcusyäsˈtrō, jăsˈ– [key], 1829–1903, American rabbi and Talmudic scholar, b. Poland. He was a rabbi (1866–92) in Philadelphia, editor of the Talmud material…

Al Hillah

(Encyclopedia) Al HillahAl Hillahäl hĭlˈlä [key], city (1987 pop. 268,834), provincial capital, central Iraq, on a branch of the Euphrates River. It was built (c.1100) largely of material taken from…

Evans, Charles

(Encyclopedia) Evans, Charles, 1850–1935, American librarian and bibliographer, b. Boston. He organized many major American libraries including the Indianapolis public library, the Enoch Pratt Free…

mulch

(Encyclopedia) mulch, any material, usually organic, that is spread on the ground to protect the soil and the roots of plants from the effects of soil crusting, erosion, or freezing; it is also used…

ultramarine

(Encyclopedia) ultramarine, blue pigment used chiefly as a coloring material and as a bluing agent. A double silicate of sodium and aluminum with some sulfur, it is prepared commercially from kaolin…

Rouge, river, United States

(Encyclopedia) RougeRouger&oomacr;zh [key], river, c.30 mi (50 km) long, rising in S Michigan and winding S and SE to the Detroit River at the city of River Rouge. Dearborn and part of Detroit…