XU CONTENTS 



Page 



0. Second Eeport of the Committee appointed to co-operate with the Scottish 

 Meteorological Society in making Meteorological Observations on Ben 

 Nevis 594 



Ci. On the Hygrometry of Ben Nevis. By H. N. Dickson 594 



7. On the Thermal Windrose at the Ben Nevis Observatory. By Angus 

 Rankin 595 



8. On a Peculiarity of the Cyclonic Winds of Ben Nevis. By li. T. Omond 595 

 y. Final Eeport of the Committee appointed to co-operate with the Meteoro- 

 logical Society of the Mauritius in the publication of Daily Synoptic 

 Charts of the Indian Ocean for the year 1861 595 



10. On the Effect of Continental Lands in altering the Level of the adjoining 

 Oceans. By Professor Edwarb Huli,, LL.D., F.R.S 696 



11. On some Variations in the Level of the Water in Lake George, New South 

 Wales. By H. A. Russell 697 



12. On the different kinds of Thunderstorms, and on a Scheme for theii- 

 Systematic Observation. By the Hon. Ralph Abercrombt, F.H.Met.Soc. 597 



Mathematical Sub-Section. 



1. On the Criteria for Discriminating between Maxima and Minima Solutions 



in the Calculus of Variations. By E. P. Culverwell, M.A 598 



2. Some Notice of a new Computation of the Gaussian Constants. By Pro- 



fessor J. C. Adams, F.R.S 600 



3. On the Umbral Notation. By the Rev. Robert Haklet, M.A., F.R.S.... 600 



4. On Criticoids. By Robert Rawson, F.R.A.S 604 



5. Complete Integral of the ?i-ic Differential Resolvent. By the Rev. 

 Robert Harley, M.A., F.R.S 606 



6. Note on the General Theory of Anharmonics. By A. Buchheim, M.A. .. 607 



7. Transformations in the Geometry of Circles. By A. Larmor, B.A 607 



TUESDAY, SEPTEMBER 6. 



1. On the Magnetic Properties of Gases. By Professor Quincke 608 



2. Report of the Committee for constructing and issuing Practical Standards 



for use in Electrical Measurements 608 



3. On the Permanence of the B.A. Standards of Resistance. By R. T. 

 Glazebrook, F.R.S 608 



4. Final Value of the B.A. Unit of Electrical Resistance as determined by 



the American Committee. By Professor II. A. Rowland 609 



5. On the Specific Resistance of Commercial Iron, By W. H. Preece, 



F.R.S 609 



0. Ou the Influence of a Plane of Transverse Section on the Magnetic 

 Permeability of an Iron Bar. By Professor J. A. Ewing, B.Sc, F.R.S., 

 and William Low 609 



7. On the Physical Properties of a nearly Non-Magnetisable (Manganese) Steel. 



By Professor W. F. Barrett 610 



8. Ou the Application of the Centi-ampere or the Deci-ampere Balance for 



the Measurement of the E.M.F. of a Single Cell. By Professor Sir 



William Thomson, F.R.S 610 



f). On Induction between Wires and Wires. By W. H. Preece, F.R.S 611 



