CONTENTS. 
The Shift of the Neutral Points due to Variation of the Intensity of Mechanical 
Vibrations or Electric Oscillations superposed upon Cyclic Magnetisation in 
Iron. By James Russell. Issued separately November 16, 1908, 
The Effect of Load and Vibrations upon Magnetism in Nickel. By James Russell. 
Issued separately December 5, 1908, ...... 
On the Recalescence Temperatures of Nickel. By T. A. Lindsay, M.A., B.Sc., 
Carnegie Scholar, Edinburgh University. Communicated by Professor J. G. 
MacGregor. Issued separately December 22, 1908, . 
On a Question in Absorption Spectroscopy. By Robert A. Houstoun, M.A., Ph.D., 
D.Sc., assisted by Alexander S. Russell, M.A. Communicated by Professor A. 
Gray. Issued separately December 22, 1908, . 
Dissymmetrical Separations in the Zeeman Effect in Tungsten and Molybdenum. 
By Robert Jack, M.A., B.Sc., Ph.D., 1851 Exhibition Research Scholar. Com- 
municated by Professor A. Gray. Issued separately December 30, 1908, . 
On the Reducing Action of Electrolytic Hydrogen on Arsenious and Arsenic Acids 
when liberated from the Surface of Different Elements. By William Thomson, 
F.I.C. Issued separately January 21, 1909, . . . . . 
Preliminary Note on the Action of Nitric Anhydride on Mucic Acid. By Professor 
A. Crum Brown, F.R.S., and G. E. Gibson, B.Sc. Issued separately February 
19, 1909, .......... 
Temperature Observations in Loch Garry (Inverness-shire). With Notes on 
Currents and Seiches. By E. M. Wedderburn, LL.B., VV.S. Issued separately 
March 1, 1909, ......... 
On the Conditions for the Reversibility of the Order of Partial Differentiation. By 
W. H. Young, Sc.D., F.R.S. Communicated by J. H. Maclagan Wedderburn, 
D.Sc. Issued separately March 2, 1909, ...... 
Laboratory Note on a Study of Polarisation by means of the Dolezalek Electrometer. 
By A. F. Ewan, Physical Laboratory, Edinburgh University. Communicated 
by Professor J. G. MacGregor. Issued separately April 12, 1909, 
A Special Form of Photographic Camera for Recording the Readings of the Scales 
of Scientific Instruments. By James Robert Milne, D.Sc. Issued separately 
April 17, 1909, . . . 
On an Improved Form of Magnetometer and Accessories for the Testing of Magnetic 
Materials at Different Temperatures. By James G. Gray, B.Sc., Lecturer on 
Physics in the University of Glasgow, and Alexander D. Ross, M.A., B.Sc., 
Assistant to the Professor of Natural Philosophy in the University of Glasgow. 
Communicated by Professor A. Gray, F f RS. Issued separately April 17, 1909, . 
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