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of which a sound can be made to produce a visible trace or record of itself. It consists essentially of a resonant vessel, usually of paraboloidal form, closed at one end by a flexible membrane. A stylus attached to some point of the membrane records the movements of the latter, as it vibrates, upon a moving cylinder…

A device, consisting essentially of an electric arc and a camera, by which a series of photographs of the variations of the arc due to sound waves are obtained for reproduction by means of a selenium cell and a telephone.

An oily liquid hydrocarbon extracted from the creosote of beechwood tar. It consists essentially of certain derivatives of pyrogallol.

A flourlike food preparation made from skim milk, and consisting essentially of the unaltered proteid of milk. It is also used in making biscuits and crackers, for mixing with cocoa, etc. A mixture of this with butter, water, and salt is called Plasmon butter, and resembles clotted cream in appearance.…

An instrument consisting essentially of a polarizer and an analyzer, used for polarizing light, and analyzing its properties.

Crystallography of organic forms; -- a division of morphology created by Haeckel. It is essentially stereometric, and relates to a mathematical conception of organic forms. See Tectology.

An instrument for measuring the tension of the aqueous vapor in the atmosphere, being essentially a wet and dry bulb hygrometer.

inding and mixing clay, either for brickmaking or the fine arts; a clay mill. It consists essentially of an upright shaft armed with projecting knives, which is caused to revolve in a hollow cylinder, tub, or vat, in which the clay is placed.

hydraulic machine, variously constructed, for raising or transferring fluids, consisting essentially of a moving piece or piston working in a hollow cylinder or other cavity, with valves properly placed for admitting or retaining the fluid as it is drawn or driven through them by the action of the piston.…

Quincey. The English language, however, . . . had even already become too thoroughly and essentially a mixed tongue for his doctrine of purism to be admitted to the letter. Craik.

ning to, or designating, the acid liquid obtained in the distillation of wood, consisting essentially of impure acetic acid.

A rock consisting essentially of pyroxene.

Queen's metal (Metal.), an alloy somewhat resembling pewter or britannia, and consisting essentially of tin with a slight admixture of antimony, bismuth, and lead or copper. -- Queen's pigeon. (Zoöl.) Same as Queen pigeon, above. -- Queen's ware, glazed English earthenware of a cream color. -- Queen's yellow (Old C…

Without derivation; primitively; essentially. [R.] These great orbs thus radically bright. Prior.

An apparatus for the production of sound by the action of luminous or thermal rays. It is essentially the same as the photophone.

ables and simple food may also be had; -- sometimes loosely used, in English, of what are essentially basement restaurants where liquors are served.

A green micaceous mineral occurring in minute scales. It is essentially a silicate of aluminia and potash containing vanadium.

o bring to destruction; to bring to poverty or bankruptcy; to impair seriously; to damage essentially; to overthrow. this mortal house I'll ruin. Shak. By thee raised, I ruin all my foes. Milton. The eyes of other people are the eyes that ruin us. Franklin. By the fireside there are old men seated, Seeling ruined citie…

mployment; a sedentary life. Any education that confined itself to sedentary pursuits was essentially imperfect. Beaconsfield.

An apparatus consisting essentially of a mirror moved by clockwork so as to throw the rays of the sun or a star in a fixed direction; -- a more general term for heliostat.