[ iv ] 
VIII. Researches on Explosives. —No. II. Fired Gunpowder. By Captain Noble 
(late R.A.), F.R.S., F.R.A.S., F.C.S., Ac., and F. A. Abel, C.B., F.R.S., 
V.P.C.S., Ac., Ac .•.page 203 
IX. English Reproduction Table. By Dr. W. Farr, FR.S. .281 
X. Agricultural, Botanical, and Chemical Residts of Experiments on the Mixed 
Herbage of Permanent Meadow, conducted for more than Twenty Years in 
succession on the Same Land .—Part I. By J. B. Lawes, LL.D., F.R.S., 
F.C.S., and J. H. Gilbert, Pli.D., F.R.S., F.C.S., F.L.S .289 
Index to Part I. .417 
PART II. 
XI. Double Refraction and Dispersion in Iceland Spar: an Experimental Investigation, 
with a comparison with Huyghen’s Construction for the Extraordinary Wave. 
By R. T. Glazebrook, M.A., Fellow of Trinity College, Cambridge. Com¬ 
municated by Professor J. Clerk Maxwell, M.A., F.R.S. . 421 
XII. On the Normal Paraffins. —Part III. By C. Schorlemmer, F.R.S., Professor of 
Organic Chemistry in Owens College, Manchester . 451 
XIII. On the Motion of Two Spheres in a Fluid. By W. M. Hicks, M.A., Fellow 
of St. John’s College, Cambridge. Communicated by Professor J. Clerk 
Maxwell, F.R.S. .. 455 
XIV. On the Organization of the Fossil Plants of the Coal-Measures .—Part X. 
Including an Examination of the supposed Radiolarians of the Carboniferous 
RocJcs. By W. C. Williamson, F.R.S., Professor of Botany in Owens 
College, Manchester . 493 
XV. On the Relation between the Diurnal Range of Magnetic Declination and Hori¬ 
zontal Force, as observed at the Royal Observatory, Greenwich, during the years 
1841 to 1877, and the Period of Solar Spot Frequency. By William Ellis, 
F.R.A.S., Superintendent of the Magnetical and Meteorological Department, 
Royal Observatory, Greenwich. Communicated by Sir George Airy, K.C.B., 
F.R.S., Astronomer Royal . 541 
XVI. On the Sensitive State of Vacuum Discharges .—Part II. By William Spottis- 
woode, D.C.L., LL.D., Pres. R.S., and J. Fletcher Moulton, late Fellow of 
Christ’s College, Cambridge . 5G1 
