— CXCVII — 



concerning a Change in the Position of the Earth' s Axis. — /. 

 Cookie. Notes hearing on Mathematica! History. — Balfour Ste- 

 wart. On an Instrument for measuring the Direct Heat of the 

 Sun. — W. Dodgson. On a Graphical Method of Drawing Spectra. 

 B. Angus Smith. The Eucalyptus near Rome. — The Distribution 

 of Ammonia. — ■ E. Schmick, and H. Roemer. On some Isomeri- 

 des of Alizarine. — 0. Reynolds. On Ihe Manner in which Rain- 

 drops and Hailstones are fonned. — On the Formation of Hails- 

 tones, Raindrops and Snowflaches. — /. Baxendell. On Changes 

 in the Rates of Moitality from different Diseases during the Twenty 

 Years 1854-73. — /. B. Millar. On the Directions of the Face 

 joints of Oblique Arches. — S. Crompton. On a Portrait of Tycho 

 Brahe. — W. A'. Clifford. On the Types of Compound Statement 

 involving tour Classes. — H. Poynting. On the Law of Force 

 when a Thin, Homogeneous, Speiical Shell exerts no Altraclion 

 on a Particle within it. — Cayley. On Compound Combinations. — 

 R. Rawson. On Ternary Differential Equations. — On the Cubie 



ra 



Integrai u n: \ . , . — T. H. Core. ResuUs 



J/Sy(a-x)(b-x){c~x) 



of the Monthly Observations of the M.ignetlc Dip, Horizotital Force, 

 and Declination, made at the Magnetic Observatoiy of the Owens 

 College, from Jannuary 1874 to Decomber 1876. — A. Ransame. 

 Losses and Gams in the Death-toll of England and Wales during 

 the last Thyrty Years. — H. A. Hurst. List of Desert-Plants col- 

 lected at Ramleh, near Alexandria, Egypt from September 1875 

 to Aprii 1876. — H. Baker. On some Thionates. — C. A. Burghardt. 

 On the Origin of some Ores of Copper. — V. Thomson. On the 

 Construjtion of a Room or Series of Rooms free from Geim Li- 

 fe, proposed for use in the perfoiin.uice of Surgical Opeiations. 



— H. E. Roscoe. On Metallic Niobium and a new Niobium Chlo- 

 ride. — C. Chambers. On the Geoinetrioal Representation of the 

 Equation of the Second Degree. — E. W. Binney. Notice of a Fos- 

 sil Plaut found at Laxey, in the Isle of Man. — E. Schunck. On In- 

 digo-Blue (rem Polygonum tinctorium and olher Plants. — /. B. 

 Bannay. On Siliceous Fossilization. — On a New Caloiimeter. 



— R. S. Baie und C. Sehorlemmer. On Aurin. - /. Bottomlcy. 

 On some Colorimetrical Experiments. 



*Metcorologisc/ie und Magnelische Beobachlimgen der K, 



