Blueprint. A drawing transferred to chemically treated paper by eXposure to light. Process known as "blue-printing."
Blue stain. (Wood) Caused by a fungus growth in unseasoned lumber. While objectionable in appearance, it does not have any great effect on the strength of the wood.
Bluestone, blue vitriol, or copper sulphate. (Chern.) Blue, poisonous crystals slowly efflorescing in the air. (CuC045HP) Obtained by the action of dilute sui ph uric acid on copper oxide in large quantities, with evaporation and crystallization. Used in the textile industry, electric batteries, germicides, fungicides, etc.
Blumlein. Commonly applied to stereo microphone technique (crossed-pair) and other audio ideas or principles deriving from A.D. Blumlein.
Blunging machine. (Pot.) A pottery machine used for mixing clays.
Blushing. (Paint and Lacquer) A blooming that appears as a white or gray cloud in the film on hot, humid days. It occurs due to the rapid evaporation of the solvents.
Board. Thin timber as distinguished from planks or strips. Long pieces less than 2 in. thick and more than 4 in. wide are called boards. (Papermkg.) Stiff paper composite, used to reinforce various cover
materials, and in box making. .
Board foot. The unit of measure for lumber: one foot square and one inch or- less in thickness.
Board measure. (Woodwkg.) The term in which quantities of lumber are designated and prices determined.
Bo.ard tule. (Woodwk.) A graduated scale used in checking lumber for quantity.
Boasting. (Furn.) Rough carving.
Bobbin. (Plast.) A formed core upon
which the coil of a magnet is wound.
Bobkin. (Print.) A long, sharppointed tool for removing type from a line in order to make corrections.
Bodoni. (Print.) The designer of the. first modem Roman-faced type; Bodoni type.
Body. (Aero.) The fuselage of an airplane with its cowling and covering. (Cerarn.) A piece of ware exclusive of any finish, such as glaze or decoration. (Mech.) The main portion of a pattern, casting, forging, or machine. (Plast.)A term used in the plastic industry to indicate viscosity in a fluid, either resin or other material; viz. "light body," or "heavy body."
Bodying in. (Furn.) A process in French polishing executed before the finishing stage; literally, filling in the grain of the wood.
Body matter. (Print.) That part of an advertisement set in body type, not display.
Body type. (Print.) Type generally used for reading matter in books. etc.
Bog ore. A soft iron ore found in
swampy places.
Bohr sommerfeld atom. atom obeying modifications of Bohr's laws suggested by Sommerfeld and allowing for possibility of "elliptic electron orbits.
Bohr's theory. The theory of atomic structure hypothesizing that electrons revolve in individual orbits around a nucleus, that the possible energy states in which the atom may appear are quantized and that radiation is emitted when the atom moves. from one energy state to a lower energy state.
Boiled oil. (Print.) Linseed oil whiCh has been heated to 400 to 500 deg. F. and while hot has added to it a small quantity of lithrage or man
ganese dioxide. Used to promote the quick drying of paint. Serves as an excellent polish for antique furniture.
Boiler. The term is of wide application. (1) That part of a
furnace in which steam is generated for heating or power as in industrial plants, ships, household heating, etc. (2) The closed container in which hot water is stored for domestic )Jse. In general, any closed liquid-containing vessel to which" heat is applied. Distinguished from tanks or open
container. (3) According to use and construction, boiler for heating and power purpose and classified as (a) cast-iron sectional, (b) steel fire tub.c) steel water tube, and (d) special.
Boiler horsepower. (Engin.) In a boiler, the evaporation of34.5Ib. of water per hour from and at 212 deg. F. Equivalent to 33,471.9 B.T.W. per hour.
Boilermaker. One who manufactures tanks and boilers.
Boiler place. (Metal.) Steel sheets or
plates rolled for use in the construction of tanks or boilers.
Boiler room. (Engin.) The part of a factory or other building in which the boiler and accessories for heating and power are placed.
Boiler scale. Precipitate of carbonates and sulphates of calcium and magnesium and other suspended matter inside a boiler.
Boiling point of water. The termperature at which water begins to boil, under ordinary conditions; 212 deg. For 100 deg. C.
Boiling water reactor (BWR). A nuclear reactor in which water (in contact with the fuel) is used as both coolant and moderator.
Bold. (Print.) Heavy-faced type.Anything standing out prominently.
Boldface. (Print.) Type heavier than the text with which it is used. Used to giv prominence to headings. Bole. A fine, compact, unctuous or plastic clay usually coloured yel low, brown, ~r balck by iron oxide;formerly used as a pigment.
Bolection.A molding around the edge of a panel and projecting beyond and surface of the casing which holds the panel.
Bollard. A post of cast iron or wood, on a dock used in mooring vessels. Also used on the decks of vessels.
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