Online Encyclopedia

Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.

HORNBLENDE

Online Encyclopedia

Originally appearing in Volume V13, Page 708 of the 1911 Encyclopedia Britannica.

» Make a correction to this article.
» Add information or comments to this article.

Encyclopedia Home :: HIG-HOR

Spread the word:

del.icio.us it!

HORNBLENDE , an important member of the See also:

AMPHIBOLE

amphibole See also:

GROUP

group of See also:

rock-forming minerals. The name is an old one of See also:

German origin, and was used for any dark-coloured prismatic crystals from which metals could not be extracted. It is now applied to the dark-coloured aluminous members of the mono-clinic amphiboles, occupying in this group the same position that See also:

AUGITE

augite occupies in the See also:

PYROXENE

pyroxene group. The See also:

MONOCLINIC

monoclinic crystals are prismatic in See also:

HABIT (through the French from Lat. habitus, from habere, to have, hold, or, in a reflective sense, to be in a certain condition; in many of the English senses the French use habitude, not habit)

habit with a six-sided See also:

CROSS

cross-See also:

section; the See also:

ANGLE (from the Lat. angulus, a corner, a diminutive, of which the primitive form, angus, does not occur in Latin; cognate are the Lat. angere, to compress into a bend or to strangle, and the Gr. ayKOS, a bend; both connected with the Aryan root ank-, to

angle between the See also:

PRISM (Gr. rrpivµa, properly a thing sawn, Irpii"ety, to saw)

prism-faces (M), parallel to which there are perfect cleavages, is 55° 49'. The See also:

COLOUR (Lat. color, connected with celare, to hide, the root meaning, therefore, being that of a covering)

colour (See also:

green, See also:

brown or See also:

black) and the specific gravity (3.0-3.3) vary with the amount of See also:

IRON [symbol Fe, atomic weight 55.85 (0=16)]

iron See also:

PRESENT

present. The pleochroism is always strong, and the angle of See also:

OPTICAL

optical extinction on the See also:

PLANE

plane of symmetry (x in the figure) varies from o to 37°. The chemical See also:

composition is expressed by mixtures in varying proportions of the molecules Ca(Mg,Fe)s(SiO3)s, (Mg,Fe)(Al,Fe)2SiO6 and NaAl(SiO )s. Numerous varieties have been distinguished by See also:

SPECIAL

special names: edenite, from Edenville in New See also:

York, is a See also:

PALE (through Fr. pal, from Lat. palms, a stake, for paglus, from the stem pag- of pangere, to fix; " pole " is from the same original source)

pale-coloured aluminous amphibole containing little iron; pargasite, from Pargas near See also:

ABO (Finnish Turku)

Abo in See also:

FINLAND (Finnish, Suomi or Suomenmaa)

Finland, a green or bluish-green variety; See also:

COMMON

common hornblende includes the greenish-black and black kinds containing more iron. The dark-coloured porphyritic crystals of basalts are known as basaltic hornblende. Hornblende occurs as an essential constituent of many kinds See also:

BUFFON, GEORGE LOUIS LECLERC, COMTE DE (1707-1788)

Buffon, as was his manner, enlarges on the cruel injustice done to these birds by Nature in encumbering them with this deformity, which he declares must hinder them from getting their See also:

food with ease. The only corroboration his perverted view receives is afforded by the observed fact that hornbills, in captivity at any See also:

RATE

rate, never have any See also:

FAT (O.E. fdett; the word is common to Teutonic languages, cf. Dutch vet, Ger. Fett, &c., and may be ultimately related to Greek Irian, and =apos, and Sanskrit pivan)

fat about them. 2In The See also:

MALAY

Malay See also:

ARCHIPELAGO

Archipelago (i.

213), See also:

Wallace describes'a nestling See also:

HORNBILL

hornbill (B. bicornis) which he obtained as " a most curious See also:

OBJECT

object, as large as a See also:

PIGEON

pigeon, but without a particle of plumage on any See also:

PART

part of it. It was exceedingly plump and soft, and with a semi-transparent skin, so that it looked more like a bag of jelly, with See also:

head and feet See also:

STUCK, FRANZ (1863— )

stuck on, than like a real See also:

BIRD

bird.' of igneous rocks, such as hornblende-See also:

GRANITE (adapted from the Ital. granite, grained; Lat. granum, grain)

granite, See also:

SYENITE

syenite, See also:

DIORITE (from the Gr. S&oi4eiv to distinguish, from hA through, Epos, a boundary)

diorite, hornblende-See also:

ANDESITE

andesite, See also:

BASALT

basalt, &c.; and in many crystalline See also:

SCHISTS (Gr. vxq'ecv, to split)

schists, for example, See also:

AMPHIBOLITE

amphibolite and hornblende-schist which are composed almost entirely of this See also:

MINERAL

mineral. Well-crystallized specimens are met with at many localities, for example: brilliant black crystals (syntagmatite) with augite and See also:

MICA

mica in the sanidine bombs of See also:

MONTE

Monte Somma, See also:

VESUVIUS (also Vesevus in ancient poets)

Vesuvius; large crystals at See also:

ARENDAL

Arendal in See also:

Norway, and at several places in the See also:

state of New York; isolated crystals from the basalts of Bohemia. (L. J. S.) See also:

HORN-See also:

BOOK

BOOK, a name originally applied to a See also:

SHEET

sheet containing the letters of the See also:

ALPHABET (see also WRITING)

alphabet, which formed a primer for the use of See also:

CHILDREN, LAW RELATING TO

children. It was mounted on See also:

wood and protected with transparent horn. Sometimes the See also:

LEAF (O. Eng. leaf, cf. Dutch loof, Ger. Laub, Swed. lof, &c.; possibly to be referred to the root seen in Gr. Ma-eta, to peel, strip)

leaf was simply pasted against the slice of horn. The wooden See also:

FRAME

frame had a handle, and it was usually hung at the See also:

child's See also:

GIRDLE (O. Eng. gyrdel, from gyrdan, to gird; cf. Ger. Gurtel, Dutch gordel, from giirten and gorden; "gird" and its doublet " girth " together with the other Teutonic cognates have been referred by some to the root ghar—to seize, enclose, seen in Gr. )(s

girdle. The sheet, which in See also:

ancient times was of vellum and latterly of See also:

paper, contained first a large cross—the criss-crosse—from which the horn-book was called the See also:

Christ Cross See also:

ROW, JOHN (c. 1525—1580)

Row, or criss-cross-row. The alphabet in large and small letters followed. The vowels then formed a See also:

LINE

line, and their combinations with the consonants were given in a See also:

TABULAR

tabular See also:

FORM (Lat. forma)

form.

The usual See also:

EXORCISM (Gr. EEop,d av, to conjure out)

exorcism—" in the name of the See also:

FATHER

Father and of the Sonne and of the See also:

HOLY

Holy See also:

GHOST (a word common to the W. Teutonic languages; O.E. vest, Dutch, 'geest, Ger. Geist)

Ghost, See also:

AMEN

Amen "—followed, then the See also:

Lord's See also:

Prayer, the whole concluding with the See also:

ROMAN

Roman numerals. The horn-book is mentioned in See also:

SHAKESPEARE, WILLIAM (1564-1616)

Shakespeare's Love's Labour's Lost, v. 1, where the ba, the a, e, i, o, u, and the horn, are alluded to by See also:

MOTH

Moth.

End of Article: HORNBLENDE

Additional information and Comments

There are no comments yet for this article.

» Add information or comments to this article.

Please link directly to this article:
Highlight the code below, right click, and select "copy." Then paste it into your website, email, or other HTML.

Site content, images, and layout Copyright © 2006 - Net Industries, worldwide.
Do not copy, download, transfer, or otherwise replicate the site content in whole or in part.

Links to articles and home page are always encouraged.

[back]
HORNBILL

[next]
HORNBY, SIR GEOFFREY THOMAS PHIPPS (1825-1895)