anemometer

exni’mem:-tai nm. an instyument for me suring the veleczty, pre ure, or other pre per ties of the wind; a wind-gage; a wind-meter. Biram’s anemometer, a form of wind-gage. calibration of an anemometer, the conversion of ane memeterzreadings into true windzvelecaties or w1ndzpre ures by application of whirling-apparatus methods. Hagemann’s anemometer, a suction an eme meter by which the veleczty 1s found from the rarefaction produced within a vertzeal tube by the wind.. helicoid anemometer, a medzfied form of Woltman’s an eme meter in which the plates are bent into helzcerdal sur-. faces like those of a screw propeller; a helicezdal an eme meter. Hooke’s anemometer, a pendulum an eme meter. same vertical plane and tangent to the advancing edge of the aeroferl; the entzant angle; the leading-angle: the oppos it of angle of trail. angle of impact, same meaning as angle of incidence. angle of incidence, the angle at which an aeroferl, as a whole, strikes or impinges upon the air; the angle which the sustaining-planes of an aircraft, 1n entering the air, make with the apparent direction of the airzcurrent; the angle formd by the line of motion of an aerofezl with the line (or chord of the curv) of mmtersection of the aerofeit with the vertical plane pa ing thru the aeroferl’s line of motion; the angle of 1mpact; the angle of attack. angle of the vertical, see under vertical (noun). angle of the wing, see under wing (noun, sense 1). angle of trail, the angle at which the rear’ edge of an advancing aeroplane or aerocurv trails or 1s drawn along thru the air as it leaves it behind; the angle at which the following edge of an aerofoil leaves or comes out of the air; the angle formd by the line of motion of an aerofeil with a line in the same vertical plane and tangent to the following edge of the aeroferl; the trailrng-angle: the eppostt of leading-angle and angle of entry. carpal angle, the bend or flexure of a bird’s wing; the angle of the wing; the bend. entrant angle, same meaning as angle of entry. law of the-angle, the law relating to the angle of incidence at which a wing or aerofeil 1s presented to the air. negative angle of incidence, the angle of mnczdence of an aerofo1l whose line of motion slants downward or below the herrzental; the negativ angle of inclination of the line of flight of an aeroplane or aerocurv. negative angle of inclination, the angle of the inclzrnation of an aeroferl, or of its line of flight, when it slants or slopes downward, or below the herzzental. optima angle, the best or most advantageous angle of merdence at which a wing, aeroplane, or aeroferl may be presented to the air. positive angle of inclination, the angle of the inclination of an aeroferl, or of its line of flight, when it slants or slopes upward, or above the herzzental. antenna,in’teno n. [plural antennae] a receiving-device used in wirele telegrafy. antennae,in’te,ni n.pl. see antenna. anthelion,in’01i-li-on ». [ploral anthelia] a luminous and usually colord ring or nimbus seen (single or rn concentric series) surrounding the shadow of the observer’s hod pro- jected en the under or upper surface of the clouds, or en a fegzbank, or en dewzcoverd gra , oppos it to the sun; an aureola; a glory. an thro porn is,enQso’pe:z-nis n. a flying-machine designed in the year 1877 by de Louvrié. anti cyclonal,entz-sarkzoo-nl,,entz’sa1-kze-nt mn. same meaning as anticyclonic. anticyclone,inti’sa1,kzon n. a wether-condition presenting some features which are the oppos its of those presented by a cyclone; the rotary outward flow of air from a region of high barometzyic pre ure; also the whole system of high pre ure and outward flow. anticyclonic,ent i-sai’kzenzk adj. 4. opposed to cyclonic: as, an *anticyclenre theory. 2. related to, or having the nature of, an anticyclone. Galton’s anticyclonic law, the law of anticyclones announced by Galton in 1863; Galton’s anticyclonic rule. anti cyclonically,entz-sar’krenz-ke-lz adv. in the manner of an anticyclone; in an anticyclonic manner.: antisolar,xnt1’soo-lei, (a umptivly) ‘entz,soo-loz adj. situ-- ated at a pent oppos it to the sun, as the center of the rainbow or the gegenschein; located at the antelies. antisun ‘entz,san 7. 4. the pent in the sky diametrically oppos it the sun. 2. the point in the sky oppos it the sun in azimuth and at at the same altitude as the sun above the horizon. antitrade ‘entz,treed n. a wind that blows stedily above the trad-wind and in the oppos it drrection to it; an antztyadewind; a return-trade. antitrade wind,inti’trade,wind, (by contrast) ‘entz,tyeedwind n. the wind or a irc current above and épposzt in direction to a trad-wind; the antztrade; the countertrade; the return-trade. anti-twilight,inti’twarlait n. the twilight arc, as first seen in the east oppos it the setting sun. Antwerp ’en,twezp n. a kind of carrier-pigeon. apter a ‘epto-za n. pl. wingle insects, etc. apteral ‘xpta-zat adj. wingle ; (an zoology) apterous. apter an ‘epta-zan adj. wingle . apter an ‘epte-zon 7. a wingle mmsect; one of the apter a. apterium ep’ti:-zi-om n. [plural apteria] a fet her le tract en the skin of a bird; an a pterion: distinguisht from pteryla. apteroid ‘xpta,ze1d adj. wingle ; as of something relatzvly destitute of wings or sustaining-surfaces; stmilar to that of a wingle thing. compare pterygoid. apteroid aspect, see under aspect.