Document DDzGngNZ9ybKyV4O6qxXEXZgQ

Heating Ventilating Air Conditioning Guide 1938 74 Physical & Physiological Principles of Air Conditioning Table 6. Degrees of Perspiration for Persons at Work Under Various Atmospheric Conditions Work Rale 33,000 Ft Lb per Hour Dbobeb or Perspiration* Forehead clammy--------------------- ---------* Body clammy....----------~--------------------- Body damp---- ------------ *---------------------Beads on forehead-------------------------- :-- Body wet----------------------------- -----;----Perspiration on forehead runs and dripaPerspiration runs down body---------------- Atmospheric Condition 95 Per Cent Relative Humidity 20 Per Cent Relative Humidity E.T. D. B. W. B. E.T. D. B. W. B. 59.0 59.4 58.3 69.5 80.5 56.5 50.0 50.2 49.3 57.0 61.6 44.2 60.0 60.3 59.3 62.5 69.6 49.5 68.0 68.5 67.5 76.0 91.0 63.4 69.0 69.6 68.5 71.0 82.8 53.0 78.5 79.3 78.0 82.0 100.5 70.2 79.0 79.8 78.5 81.0 99.8 69.0 "Forty per cent of subjects registered degree of perspiration equal to or greater than indicated. supply, which can be obtained more conveniently from the increase in moisture content of the ventilating current. I HEAT AND MOISTURE GIVEN UP BY HUMAN BODY In conditUioLnTinRgA-aVirIOfoLrEcTomRAfoDrtIAaTndIOhNeaAltNh Dit IisOnNeIcZeAssTaIOryNto know the rate of sensible and latent heat liberation, from the human body, which in coInnjusnpcitteioonfwthitehraopthideradhveaantcleosadins t(hseeefiCelhdaopftearisr c5oanndditio7)nidnegtedrumriinneg tthhee cpaasptacfeitwy oyfetahres, ctohneditsioecnreert. ofThreepdroadtauciinngcoimndmooonr uastemaorsephtheoresse ooff thaes Ast.iSm.uHl.aVti.nEg. Rqueaseliatirecsh aLsatbhoorsaetoerxyi4s6tisnhgowountdinooFrisgsu.n8d,e9r, i1d0eaalnwde1a1t.heOr cthoenr duisteiofunls,dahtaas anreotgaivsenyeint bTeaebnlefsou4n, d5. anEdxte6n, swivheichstuadreiessehlfa-evexpflaanileadtortyo. elucidate the cause of the stimulating quality of country air, qualities which are lost when such air is brought indoors and particularly when it is handled by mechanical means. Ultra-violet light and ionization have been suggested but the evidence so far is inconclusive or negative47. "Thermal Exchanges between the Bodies of Men Working and the Atmospheric Environment, by F. C. Houghten, W. W. Teague. W. E. Miller and W. P. Yant (American Journal of Hygiene, Vol.'XIII, No. 2. March. 1931. pp. 415-431). 4?Changes in Ionic Content in Occupied Rooms. Ventilated by Natural and Mechanical Methods, by C. P. Yaglou. L. C. Benjamin and S. P. Choate (A.S.H.V.E. Transactions. Vol. 38.1932. p. 191). Physio logic Changes During Exposure to Ionized Air. by C. P. Yaglou, A. D. Brandt and L. C, Benjamin (A.S. H.V.E. Transactions, Vol. 39, 1933. p. 357). Diurnal and Seasonal-Variations in the Small Ion Content of Outdoor and Indoor Air, by C. P. Yaglou and L. C. Benjamin (A.S.H.V.E. Transactions, Vol. 40, J34, p. 271). The Nature of Ions in Air and Their Possible Physiological Effects, by L. B. Loeb (A.S. jLV.E. Transactions, Vol. 41, 1935. p. 101). The Influence of Ionized Air upon Normal Subjects, by ff: Herrington (Journal Clinical Investigation, 14, January, 1935). The Effect of High Concentrations of Light Negative Atmospheric Ions on the Growth and Activity of the Albino Rat, by L. P. Herrington and Karl L. Smith (Journal Ind. Hygiene, 17. November. 1935). Subjective Reactions.of/Human Beings to Certain Outdoor Atmospheric Conditions, by C.-E. A. Winslow and L. P; .Herrington (A.S.H.V.E. Transactions. Vol. 42. 1936. p. 119). . 75