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Contents of PROCEEDINGS, No. A 512. September, 1905. 
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Page * 
THE ELASTIC PROPERTIES OF STEEL AT HIGH TEMPERATURES. ; : 
By Bertram Hopxinson, M.A., M.I.C.E., Professor of Meare and ee Mechanics in the . mee 
Dairy of Cambridge, and F. ROGERS, B.A. (Cantab.), M.Sc., M.Eng. .. 419 4 <a 
= 
ON THE REFRACTIVE INDEX OF We ee Be candnes = © aa 
CuTHBERTSON and E. B. R. Pripeaux, M.A., B.Sc. (Abstract) Me 496 a ry 
THE ABSORPTION SPECTRUM AND FLUORESCENCE OF MERCURY sre 
VAPOUR. By W. N. Harttey, D.Sc., F.R.S. 428 — 
THE FORMATION OF ICE AND THE GRAINED STRUCTURE ge = 2% 8; 
GLACIERS. By G. QuinckE, For. Mem. R. S., Professor of Physics in the University of Heidelberg .. 431 . 
ON THE INFLUENCE OF COLLISIONS AND OF THE MOTION OF 
MOLECULES IN THE LINE OF Seana Water THE eet has ec ss OF A SPEC 
LINE. By Lorp Rayveicu, O.M., F.R.S.. 440 
T WITH THE BALANCE TO FIND IF CHANGE OF 
AN pene ae ANY EFFECT eet Ge BS i Bes. Seay. — and 
Percy Puitiips, M.Sc. Ne .- 445 
A NEW FORM os Te ieee Py ot WILLIAM Choe, Hon Des 
(Oxford and Dubl.), F.R.S.. ; 458 
THE INFLUENCE OF PHASE CHANGES ON THE TENACITY OF 
DUCTILE METALS AT THE ORDINARY TEMPERATURE AND AT THE BOILING 1 POINT . 
OF LIQUID AIR. By G. T. Bettsy and H. N. Bemy, B.Sc. (Plate5) .. 462 
THE REFRACTIVE INDICES OF SULPHURIC ACID AT Die ee 3 ae 
CONCENTRATIONS. By V. H. Vevey, F.R.S., and J. J. Mantey, M.A. .. 469 cg 
RUM OF THE SPONTANEOUS LUMINOUS RADIATION 
ON yee ee IIll.—RADIATION IN HYDROGEN. BY Sir WILLIAM SEC SINS), KGB 3 ‘Sey a 
O.M., D.C.L., Pres. R.S., and Lapy Huaeins, Hon. Mem. R.A.S. 3 488 see i 

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