TRASS  , the See also:

• LOCAL

local name of a volcanic See also:

• TUFF (Ital. tufo)

tuff occurring in the See also:

• EIFEL

Eifel, where it is worked for See also:

• HYDRAULIC

hydraulic See also:

• MORTAR

mortar . It is a See also:

• GREY, CHARLES GREY, 2ND EARL (1764-1845)
• GREY, HENRY GREY, 3RD EARL (1802-1894)
• GREY, LADY JANE (1537-1554)
• GREY, SIR EDWARD
• GREY, SIR GEORGE (1812–1898)

grey or cream-coloured fragmental See also:

• ROCK
• ROCK (O.Fr. rake, Sp. rota, Ital. rocca; possibly from a Lat. form rupica, from rupes, rock)
• ROCK, DANIEL (1799–187t)

rock, largely composed of pumiceous dust, and may be regarded as a trachytic tuff . It much resembles the See also:

• ITALIAN

Italian puzzolana and is applied to like purposes . Mixed with See also:

• LIME
• LIME (O. Eng. lim, Lat. limes, mud, from linere, to smear)

lime and See also:

• SAND
• SAND, GEORGE (1804-1876)

sand, or with See also:

• PORTLAND
• PORTLAND, EARL OF
• PORTLAND, ISLE OF
• PORTLAND, WILLIAM BENTINCK, EARL
• PORTLAND, WILLIAM HENRY CAVENDISH BENTINCK

Portland See also:

• CEMENT (from Lat. caementum, rough pieces of stone, a shortened form of caedimentum, from caedere, to cut)

cement, it is extensively employed for hydraulic See also:

• WORK

work, especially in See also:

• HOLLAND
• HOLLAND, CHARLES (1733–1769)
• HOLLAND, COUNTY AND PROVINCE OF
• HOLLAND, HENRY FOX, 1ST BARON (1705–1774)
• HOLLAND, HENRY RICH, 1ST EARL OF (1S9o-,649)
• HOLLAND, HENRY RICHARD VASSALL FOX, 3RD
• HOLLAND, JOSIAH GILBERT (1819-1881)
• HOLLAND, PHILEMON (1552-1637)
• HOLLAND, RICHARD, or RICHARD DE HOLANDE (fl. 1450)
• HOLLAND, SIR HENRY, BART

Holland; whilst the compact varieties have been used as a See also:

• BUILDING

building material and as a See also:

• FIRE (in O. Eng. f j'r; the word is common to West German languages, cf. Dutch vuur, Ger. Feuer; the pre-Teutonic form is seen in Sanskrit pu, pavaka, and Gr. irup; the ultimate origin is usually taken to be a root meaning to purify, cf. Lat. purus)

fire-See also:

• STONE
• STONE (0. Eng. shin; the word is common to Teutonic languages, cf. Ger. Stein, Du. steen, Dan. and Swed. sten; the root is also seen in Gr. aria, pebble)
• STONE, CHARLES POMEROY (1824-1887)
• STONE, EDWARD JAMES (1831-1897)
• STONE, FRANK (1800-1859)
• STONE, GEORGE (1708—1764)
• STONE, LUCY [BLACKWELL] (1818-1893)
• STONE, MARCUS (184o— )
• STONE, NICHOLAS (1586-1647)

stone in ovens . Trass was formerly worked extensively in the Brohl valley and is now obtained from the valley of the Nette, near See also:

• ANDERNACH

Andernach .