[ iv ] 
XI. Determination of the Number of Electrostatic Units in the Electromagnetic Unit 
made in the Physical Laboratory of Glasgow University. By Hugald MTyichak, 
31. A. Communicated by Sir William Thomson, F.B.S. &c. . . page 409 
XII. On the Minute Structure of the Leg-muscles of the Water-beetle. By Edward 
Albert Schafer. Communicated by Dr. Sharpey, V.P.B.S. 429 
PART II. 
XIII. Results of the Comparisons of the Standards of Length of England, Austria , 
Spain , United States, Cape of Good Hope, and of a second Russian Standard, 
made at the Ordnance Survey Office, Southampton. By Lieutenant-Colonel 
A. R. Clarke, C.B., R.E. , F.R.S., Ac., under the direction of Mayor-General Sir 
Henry James, B.E., F.B.S., Ac., Director-General of the Ordnance Survey. 
With a Preface and Notes on the Greek and Egyptian Measures of Length by 
Sir Henry James 445 
XIV. Report on the Exploration of Brixham Cave, conducted by a Committee of the 
Geological Society, and under the superintendence o/'Wm. Pengelly, Esq., F.R.S., 
aided by a local Committee ; with Descriptions of the Animal Remains by George 
Busk, Esq., F.B.S. , and of the Flint Implements by John Evans, Esq., F.B.S. 
By Joseph Prestwich, F.B.S., F.G.S., Ac., Reporter 471 
XV. On a new Locality of Amblygonite, and on Montebrasite, a new Hydrated Aluminium 
and Lithium Phosphate. By M. A. O. Des Cloizeaux, 3Fember of the Institute of 
France. Communicated by Professor W. H. Miller, Foreign Secretary B.S. 57 3 
XVI. The Bakerian Eecture. — On the Radiation of Heat from the Moon, the Law of 
its Absorption by our Atmosphere, and of its Variation in Amount with her Phases. 
By the Earl of Rosse, B.A., D.C.L., F.B.S 587 
XVII. On a view Genus of Amphipod Crustaceans. By Rudolph von Willemoes- 
Suhm, Pli.D., Naturalist to the ‘ Challenger ’ Exploring-Exp edition. Commu- 
nicated by Dr. Wyville Thomson, F.B.S 629 
XVIII. Researches in Spectrum- Analysis in connexion with the Spectrum of the Sun . — 
No. II. By J. Norman Lockyer, F.B.S 639 
Index . 
659 
