atmosphere (atmosfer)

[F. atmosphère = Pg. atmosphera = Sp. atmósfera = It. atmo sfera = Sw. atmosfer = Dan. atmosfære = G. at mosphäre, atom nected by a rod with a piston working in a cylinder to which air is admitted at the center of its length. A reciprocating motion is given to the cylinder, and by means of the air confined between its other end and the piston a corresponding motion is given to the piston-head connected with it. - Atmospheric line. ( a ) In a diagram of steam-pre ure, a line drawn by the pencil when the In addition to the lines of Fraunhofer, indubitably be the square inch. 2. A conventional unit of atmospheric pre ure. An atmosphere is in English use the pre ure of a vertical column of 30 inches of mercury at the freezing-point at London; in French use it is the pre ure of 760 millimeters of mercury at the freezing-point at Paris. For the absolute atmosphere in the C. G. S. (centimeter-gram second) system, see absolute. The weight of the atmosphere to the square inch is commonly employed as a convenient unit for pre ures arising from other causes, such as the weight of liquids, the force of steam, etc.: thus, a pre ure in a steam-boiler of 3 atmospheres means a pre ure equal to 45 pounds per square inch. The apparatus.. was of great simplicity, all of gla , capable of resisting the pre ure of many atmospheres. Science, VIII. 56. 3. The gaseous envelop surrounding any of the heavenly bodies. No sound, either loud or soft, could be heard by any no atmosphere. inhabitant of the moon, because the moon practically has J. N. Lockyer , Spect. Anal., p. 22. 4. Any gaseous medium. onging the suither the darknes in the tion of the terrestrial atmosphere, and are therefore called atmospheric lines. Lommel, Light (trans.), p. 166. Atmospheric pre ure. See atmosphere, 2.- Atmospheric pump, a pump in which the water is forced into the suction-pipe by atmospheric pre ure. - Atmospheric railway, a railway so constructed that the motive power is derived from the pre ure of the atmosphere acting on cated by minute variations of pre ure on the barometer. atmospherical (at-mos-fer'i-kal), a. atmospheric. Same as By the hearth the children sit Cold in that atmosphere of Death. Absolute atmosphere. See absolute. - Electric atmosphere. See electric aura, under aural, atmospheric (at-mos-fer'ik), a. [ Quarantine cannot keep out an atmospheric disease. Cole ridge , Table-Talk. 2. Dependent on the atmosphere. Whewell , Nov. Org. Renovatum, III. ix. § 8.