. Natural and artificial methods of ventilation. r forced in wereenormous. Wonderful results may be shown in theway of tables of cubic feet of air {)ropellc(l into abuilding, but they are illusory as in any way indi-cating the efficiency of the ventilation. . . The expert further adds tohis report [on the Ventilation of the Houses ofParliament] :— I never yet knew of a system ofpropulsion, pure and smiple, that effected an efficientand satisfactory ventilation of any large building. The Architect to the Local (GovernmentBoard reports that mechanical ventilating arrange-ments are generally utte
. Natural and artificial methods of ventilation. r forced in wereenormous. Wonderful results may be shown in theway of tables of cubic feet of air {)ropellc(l into abuilding, but they are illusory as in any way indi-cating the efficiency of the ventilation. . . The expert further adds tohis report [on the Ventilation of the Houses ofParliament] :— I never yet knew of a system ofpropulsion, pure and smiple, that effected an efficientand satisfactory ventilation of any large building. The Architect to the Local (GovernmentBoard reports that mechanical ventilating arrange-ments are generally utter failures. MECIIAMCAL VENTILATION ON THE DOWNDRAUGHT SYSTEM, BY IMPULSION, OR THE PLENUM PRINCIPLE, APPLIED TO SCHOOLROOMS. A Roof Ventilator. Main Upcast Foul Air Pipes from Foul Air Air Air Kxits into Flues EE. GG Fresh Air Supply Fluesthrougli which the air ismechanically pnjjected ata high \elocity up on tothe ceilinj; and then des-cends, escaping at ExitsFF into Flues K¥... Bi-Lp;—Fresh air Y HI. LOW — Prod nets of combustion. P>(?i)\VN—Products of — Products of respirationfrom infected scholars. ■■ With all downdraught systems diluted fou! air only is breathed, never fresh, pure tiie respiretl and exhausted air, owing to its greater levity, ascends, and is returnedby ine current to the breathing level vvith the product of combustion, an<lis tlieie reinhaled. Only a ver^- strong, and what would l)e an unendurable downdraught,coulii prevent the highly rarefied expired air from rising to a height sufficient to ensure itsrebreathal. It is uiii\ersally condemned by scientific authorities as most pernicious, contrary !o the laws of Nature. ;iiid—from causes which are well known—fatal to sowing the seeds of disease.—Buildintii .Vews. XIV. Natural v. Mechanical Extraction. In a paper on Ventilation readbefore the Society of
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectventilation, bookyear
