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Contents of PROCEEDINGS, No. A 53o. June, 1907. 



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Page 



ON THE THERMO -CHEMISTRY OF FLAME SPECTRA AT HIGH 



TEMPERATURES. By W. N. Hartley, F.R.S.., D.Sc, Royal College of Science, Dubl n .. .. 242 



ON THE RESISTANCE OF AIR. By A. Mallock, F.R.S 262 



SPACE DESCRIBED IN A GIVEN TIME BY A PROJECTILE MOVING IN 



AIR. By A, Mallock, F.R.S ■ 274 



ON THE VARIATION OF THE PRESSURE DEVELOPED DURING THE 



EXPLOSION OF CORDITE IN CLOSED VESSELS. By Charles H. Lees, D.Sc, F.R.S., Professor of 

 Physics in the East London College, and J. E. Petavel, M.Sc, Lecturer on Mechanics in the University of 

 Manchester . . . . . . . . . . . . . . . . . . . . . . . • . . • • • • • ■ 277 



EXPERIMENTS WITH VACUUM GOLD-LEAF ELECTROSCOPES ON 



THE MECHANICAL TEMPERATURE EFFECTS IN RAREFIED GASES. By J. T. Bottomlev, 

 M.A., LL.D.. D.Sc, F.R.S., and F. A. King 285 



REPORT OF PRIVATE EXPEDITION TO PHILIPPEVILLE, ALGERIA, 



TO VIEW THE TOTAL ECLIPSE OF THE SUN, AUGUST 30, 1905. By T. C. Porter, M.A., 

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CHEMICAL REACTION BETWEEN SALTS IN THE SOLID STATE. By 



Edgar Philip Perman .. .. .. .. .. .. .. .. .. .. •• •• •• •■ 310 



CONSTANTS OF EXPLOSION OF CORDITE AND OF MODIFIED 



CORDITE, By Robert Robertson, M. A., D.Sc (Abstract) 320 



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