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IH. Tonic Size in Relation to the Physical Properties of Aqueous Solutions . 
By W. R. Bousfield, M.A., K.C. 
Communicated by Professor Laemok, Sec.R.S. 
Received January 5,—Read February 8, 1906. 
Part I.-—Introduction. 
Part JI.—Experimental Determinations. 
Page 
(a) Density and viscosity of NaCl solutions at 18 c C.107 
(b) Density, viscosity and conductivity of mixtures of normal solutions of KC1 and NaCl at 
18° C.'.Ill 
(c) Density of KC1 and NaCl solutions at 0° C..113 
Part III.—Ionic Size in Relation to Conductivity. 
(a) Theoretical considerations..114 
(b) Deduction of constant for NaCl..117 
(c) Distinction between autolytes and heteroly tes . ... .119 
(i d ) Mixtures. Density and conductivity. ... ..... 120 
(e) Hittorf numbers a function of the radions.121 
(/) Deduction of hydration numbers and values of radions and ionic volumes ...... 124 
Part IY.—Ionic Size in Relation to Density. 
(a) Solution volume a linear function of ionic volume.126 
(b) Deduction of density formulae.128 
Part Y.—Ionic Size in Relation to Viscosity. 
(«) Viscosity a function of the radions.129 
(i b ) References to previous theories. .132 
(c) A 'priori considerations leading to a general viscosity formula.134 
VOL. CCVI.—A 404. 7.6.06 
