CONTENTS. 
PART II. 
X. Contributions to the History of Explosive Agents . — Second Memoir. By F. A. Abel, 
F.B.S., Treas. Chem. Soc. page 337 
XI. A Memoir on the Transformation of Elliptic Functions. By Professor Cayley, 
F.R.S . . 397 
XII. Studies on Biogenesis. By William Roberts, M.B., Manchester. Communicated 
by Henry E. Roscoe, F.B.S 457 
XIII. The Bakerian Lecture. — Researches in Spectrum-Analysis in connexion with the 
Spectrum of the Sun. — No. III. By J. Norman Lockyer, F.R.S. . . . 479 
XIV. On the Quantitative Analysis of certain Alloys by means of the Spectroscope. By 
J. Norman Lockyer, F.R.S., and W. Chandler Roberts, Chemist of the Mint 495 
XV. On Attraction and Revulsion resulting from Radiation. By William Crookes, 
F.R.S. &c 501 
XVI. On Electrotorsion. By George Gore, F.R.S. 529 
XVII. The Winds of Northern India , in relation to the Temperature and Vapour- 
constituent of the Atmosphere. By Henry F. Blanford, F. G.S., Meteorological 
Reporter to the Government of Bengal. Commwnicated by Major-General 
Strachey, R.E., C.S.I., F.R.S 563 
XVIII. On a Self-recording Method of Measuring the Intensity of the Chemical Action 
of Total Daylight. By Henry E. Roscoe, F.R.S 655 
XIX. On the Organization of the Fossil Plants of the Coal-measures . — Part VI. Ferns. 
By W. C. Williamson, F.R.S., Professor of Natural History in the Owens College , 
Manchester 675 
