BLUE 



BOLTONITE 



Centaurea cyanus. B.-eyed <7rass=Sisyrin- 

 chium: a plant belonging to Irideae. B. fire: 

 ammonio-sulphate of copper, chlorate of po- 

 tash and shell-lac. B. gum ree=Eucalyptu3 

 globulus: Myrtacese. B. sftarfc=Carcharia3 

 glaucus. B. tangles=Va.ccimum frondosum. 

 B. sate=Raia beatis. B. stars: Capella, Bel- 

 latrix, Rigel, Procyon, Spica. B. vitriol= 

 Sulphate of copper. 



Blue colouring matters. Prussian B- : a cyan- 

 ide of iron. Smalt, q.v. Indigo, q.v. Ultra- 

 marine, q.v. Thenard's B.,g.v. Saxon B.: 

 a compound of indigo, Sulphuric acid, po- 

 tash, and water. 



Bluffs, an American term for high and steep 

 banks. 



Bo-tree=Ficus" religiosa: the sacred tree of the 

 Buddhists. 



Boa, (bo'a). [Ok. bous, cow.] A large snake; 

 belonging to Colubrina,tba 

 type of Boidae. Said to be 

 named from being supposed 

 to suck cows' teats, a. con-\ 

 strictor: a very powerfuli 

 snake, which kills animals 

 by coiling itself round thei' 

 so as to crush them. 



Boar, (bo'r). [Bdr, the A.-S, 

 word.] The male of swine: 

 a wild hog. B. fish=Cz- 

 pros aper. 



Board, (b5rd). [Bred, the A.-S. word.] A 

 carpenter's term for a plank less than 1J in. 

 thick. 



Boart, (bort). A dark opaque variety of dia- 

 mond. 



Boasting, (bost'ing)=Scabbling: a term used 

 in masonry. 



Boat, (bot). [A.-S. bdt.] A small vessel, 

 moved by oars. For the Varieties v. barge, 

 cutter, gig, &c. B. 6i=Cancroma cochle- 

 aria: a S. American bird. B. ./fy=Notonecta: 

 an insect which moves on the water, and 

 looks like a small boat. 



Bob-o-link=Dolichonyx orizyvorous: an Ame- 

 rican bird: also called rice-bird. 



Bode's law, That the relative distances of the 

 planets from the sun increase regularly, in 

 geometrical progression, with the addition 

 of four as a constant quantity. Column A 

 gives the estimated distances; column B the 

 ascertained distances 



A B 



Mercury, 4+ 0= 4 3'9 



Venus, . 4+ 3= ? 7 "2 



Earth, . 4+ 6= 10 10 



Mars, . 4+12= 16 15' 



Asteroids, 4+24= 28 27'5 



Jupiter, 4+48= 52 52 



Saturn, 4+96=100 95 ' 



Bodenite, (bo'den It). [Boden, in Saxony.] A 

 metallic ore, of cerium, magnesium, alumi- 

 nium, &c. 



Bodos, An Asiatic people. 



Body plan, A transverse vertical section of a 

 ship. 



Bog, (bog). [Gael, log, soft.] 1. A tract of 

 soft earth, with much water: often the result 

 of trees falling across a water-course, so as to 



dam it. 2. A tract of decaying vegetable 

 matter, forming a kind of morass. B, aspho- 

 del = Narthecium. .B. bean = Menyauthes. 

 B. butter: a variety of adipocerite. B. iron 

 ore: yellow threads of silica and clay, col- 

 oured by iron: a variety of limonite. B. 

 moss=Sphagna. B. myrtle = Myrica. B. 

 wood: trunks and branches of trees found in 

 bogs, darkened by iron. 



Bogie=Trolly : a truck running on four 

 wheels, adapted to turning sharp corners. 

 B. carriage : usually on eight wheels, in two 

 sets of four, connected by a swivel joint. 



Bohemian (bo-he'mi-an). B. diamonds : a- 

 colourless variety of rock crystal. B. chat-' 

 terer=B. icaxwingr=Bombycilla garrula : a 

 bird. 



Bohnenberg's electroscope. A dry pile, be- 

 tween the poles of which is a piece of gold leaf. 



BoidaB, (boi'de). [Boa, q.v.] A. family of 

 reptiles, including the boa, rock-snake, 

 python, &c., the largest known snakes. 



Boiled oil, Linseed oil that has been mixed, 

 by boiling, with litharge or manganese oxide. 



Boiler, (boil'er)* 1. A vessel in which watet 

 is converted into steam for the use of a steam 

 engine. Cornish B. : long and cylindrical, 

 usually with only one tube and a larga 

 amount of heating surface. Elephant B. = 

 French B. Lancashire B. has two tubes. 

 Waggon B. resembles a waggon in shape. 

 2. A term for the great equinoctial calms. 



Boiling, (boil'ing). The bubbling of a liquid 

 under the influence of heat, when the pres- 

 sure of its vapour equals that of the atmo- 

 sphere : the transition from the liquid to the 

 gaseous condition. B. point of pure water 

 at level of sea=212 F., 100 C., 80 R. 



Bojanus, organ of=Renal aperture. 



Bolderberg beds, near Brussels, the Belgian 

 Middle Tertiaries or Eocene. 



Bole, (bol). [Gk. bolos, clod.] A silicated 

 mineral of the clay group, chiefly silicate of 

 aluminium. Bed B. ; coloured by ferrio 

 oxide. 



Boletic acid, (bo-le'tik). [Boletus, 5.77.] = 

 Fumaric acid, q.v. 



Boletus, (b5-le'tus). [The Latin name.] A 

 leathery fungus, resembling the mushroom. 

 B. destructor=Dij rot, q.v. B. igniarius 

 Amadou, q.v. 



Bolides, (bo'li-dez). [Gk. bolis, a missile]^: 

 Meteors = Shooting stars : more loose in 

 structure than aerolites, and more inflam- 

 mable. 



Bologna flask. Of thick glass, which has 

 been suddenly cooled, and may be broken 

 by the least scratch. 



Bolognese, (bo'lo-nez). [B. in Italy]. B. 

 phosphorus=~i:f&tive sulphide of barium, 

 becomes phosphorescent after exposure to 

 the sun. B. sone=Bologna spar : a variety 

 of barytes or sulphate of barium, which is 

 phosphorescent after exposure to sunlight. 



Bolsover atone, [B. in Derbyshire.] A build- 

 ing stone, chiefly carbonate of calcium and 

 magnesium. 



Boltonite, A variety of olivin, chiefly sili- 

 cate of magnesium. 



