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An apparatus for projecting a powerful beam of light of approximately parallel rays, usually devised so that it can be swiveled about.

An apparatus for registering the shocks and undulatory motions of earthquakes.

of light a remarkable variation in electric conductivity, and is used in certain electric apparatus. Symbol Se. Atomic weight 78.9.

of or for itself what is usually done by human agency; automatic; as, a self-acting feed apparatus; a self-acting mule; a self-acting press.

A signal telegraph; an apparatus for giving signals by the disposition of lanterns, flags, oscillating arms, etc.

An instrument or apparatus for comparing and grading the sensitiveness of plates, films, etc., as a screen divided into squares of different shades or colors, from which a picture is made on the plate to be tested.

An apparatus used in separating, as a separating funnel.

A relay apparatus; specif.:

An apparatus for raising heavy weights, and especially for stepping and unstepping the lower masts of ships. It consists of two or more spars or pieces of timber, fastened together near the top, steadied by a guy or guys, and furnished with the necessary tackle. [Written also sheers.]

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.

A part of the apparatus for raising the heddles of a drawloom.

a tube and so adjusted as to set the air within the tube in vibration, causing sound. The apparatus is called also chemical harmonicon. -- Singing master, a man who teaches vocal music. -- Singing school, a school in which persons are instructed in singing.

An apparatus in the trumpet and trombone by which the sounding tube is lengthened and shortened so as to produce the tones between the fundamental and its harmonics.

One of the secondary branches of an antler. Snag boat, a steamboat fitted with apparatus for removing snags and other obstructions in navigable streams. [U.S.] -- Snag tooth. Same as Snag, 2. How thy snag teeth stand orderly, Like stakes which strut by the water side. J. Cotgrave.

and certain other plants, as saltwort (Salsola). See under Sodium. -- Soda fountain, an apparatus for drawing soda water, fitted with delivery tube, faucets, etc. -- Soda lye, a lye consisting essentially of a solution of sodium hydroxide, used in soap making. -- Soda niter. See Nitratine. -- Soda salts, salts hav…

An induction coil, esp. of an internal-combustion engine, wireless telegraph apparatus, etc.

An apparatus for photographing or mapping a spectrum.

An apparatus for making spectroheliograms, consisting of a spectroscopic camera used in combination with a telescope, and provided with clockwork for moving the sun's image across the slit. -- Spec`tro*he`li*o*graph"ic (#), a.

y element of the skeleton in relation with the alimentary canal, as the jaws and hyoidean apparatus. -- Splanch`nap`o*phys"i*al, a. Mivart.

One that sterilizes anything; specif., an apparatus for sterilizing an organic fluid or mixture.