Carnegie Institution of Washington publication . ier swimmer, so that a decrease of the area ofdiffusion due to loss of gas by transpiration may not occur. The curve, asbefore, is remarkably regular and partakes of the qualities of the earliercurve (fig. 5). The initial rate is — w = 7iXio~6g/day or ~13g/sec,which is of the same order as the datum of table 2, remembering that theconstants of the apparatus are slightly different. The coefficients of trans-piration are, since <z = (inside area), A = cm. 2h = cm. / = cm. and, if the water heads be taken as a trial
Carnegie Institution of Washington publication . ier swimmer, so that a decrease of the area ofdiffusion due to loss of gas by transpiration may not occur. The curve, asbefore, is remarkably regular and partakes of the qualities of the earliercurve (fig. 5). The initial rate is — w = 7iXio~6g/day or ~13g/sec,which is of the same order as the datum of table 2, remembering that theconstants of the apparatus are slightly different. The coefficients of trans-piration are, since <z = (inside area), A = cm. 2h = cm. / = cm. and, if the water heads be taken as a trial gradient for comparison, so that dp . ,. - 549 dynes/cm. £= 13 dl K= l6XlO somewhat larger than the above datum (jfe = X io-13), the difference,however, being of the same order as the irregularities of the sectional areasof the diffusion columns and referable, in part, to the values of h and hinvolved. There is, furthermore, a difference in the mean of the irregulartemperatures. Close agreement, therefore, was not to be looked cAprU. ty 24- $c%T 9 Fig. 10.—Chart showing loss of mass of gas in diver in lapse of of hydrogen into air. The final coefficients are largely subject to the water heads under whichdiffusion takes place. We may therefore write, since — w = ~6g/day or ~ug/sec. £ = ~14 and from this /c = ~10which approaches the coefficient for air ( Xio-10), as would be antici-pated. One may note, however, that it is nevertheless still below it. 32 THE DIFFUSION OF GASES THROUGH Table 7.—Diffusion of hydrogen through water into air. Heavy swimmer, M=;i?A = ; pOT=; 1 /pg = ;* A = Mgpm/Rh = \2oy, A= cm.;/i= cm.; A = cm.; / = cm. Areas, inside , outside ,ring — = ; 0/1 = ~°. Diameters , , cm.; cor-rection cm. Hg. Date. Hour. Barom-eter. // / OTXIO6 Date. Hour. Barom-eter. H t wxio6 h. w. 0 1 h. m. 0 Apr
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