Contents. 



Page 



XVI. — Further Observations on Powdery Potato-Scab, Spoiigospo7-a 

 subterranea (Wallr.). By T. Johnson, d.sc, f.l.s. (Plates 

 XII.-XIV.) (July 24, 1909.) 165 



XVII. — Meclianical Stress and Magnetisation of Iron. Part 2. By 



William Brown, b.sc. (June 21, 1909.) . . . 17S 



XVIII. — Metliods of Determining the Amount of Light scattered from 



Eough Surfaces. By W. F. Barebtt, f.r.s. (July 27, 1909.) 190 



XIX. — A New Form of Polarimeter for the Measurement of the Refrac- 

 tive Index of Opaque Bodies. By W. F. Barrett, f.r.s. (July 

 27, 1909.) . . . . . . .198 



XX. — On Montanin and Montana (Montan) Waxes. By Hugh Eyan, 



M.A., D.sc, F.R.U.I., and Thomas Dillon, m.a. (July 17, 1909.) 202 



XXI. — The Analysis of Beeswax. By Hugh Eyan, m.a., d.sc, f.r.u.i. 



(July 17, 1909.) .210 



XXII. — On the Value of Benzidine for the Detection of Minute Traces 



of Blood. By E. J. McWeeney, m.a., m.d. (August 14, 1909.) 210 



XXIII. — On the Fossil Hare of the Ossiferous Fissures of Igbtham, Kent, 

 and on the Recent Hares of the Lepus variabilis Group. By 

 Martin A. C. Hinton. (Plate XV.) (September 8, 1909.) . 225 



XXIV. — Some Observations of Dew at Kimberley. By J. R. Sutton, 



M.A., sc.D. (January 15, 1910.) . . . .266 



XXV. — On Osmotic Pressure in Plants ; and on a Thermo-Electric 

 Method of Determining Freezing-Points. By Henry H. Dixon, 

 sc.D,, F.E.S., and W. R. Gelston Atkins, m.a, (February 28, 



1910.) 275 



XXVI. — Permanent Steel Magnets. By W. Brown, b.sc. (February 21, 



1910.) . . . . . . . .312 



XXVII.— Some Variations in the Skeleton of the Domestic Horse and their 

 Significance. By Major F. Eassie, d.s.o. (Plates XVI.-XX.) 

 (March 8, 1910.) . . . . . .321 



XXVIII. — The Inheritance of Coat Colour in Horses. By James Wilson, 



M.A., B.sc (April 12, 1910.) . . . . .331 



XXIX. — Chrome Steel Permanent Magnets. By W. Brown, b.sc (April 



21, 1910.) . . . . . . .349 



XXX. — On the Distribution of Mean Annual Rainfall and average 

 number of Rain Days per year over an Area including the 

 Counties of Dublin, Wicklow, Kildare, and Meath : A Study 

 in Local Variation of Rainfall. By William J. Lyons, b.a., 

 A.R.c.sc. (LoND.) (Plate XXI. ; Map.) (May 19, 1910.) . 354 



XXXI. — The Vapour-Pressures, Specific Volumes, Heats of Vaporisation, 

 and Critical Constants of Thirty Pure Substances. By Sydney 

 Young, d.sc, f.k.s. (June 10, 1910.) . . , .374 



