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Report on the three Reports of the Liverpool Compass Committee and

other recent Publications on the same subject. By Archibald Smith,

M.A., F.R.8., and Frederick John Evans, R.N., F.R.S 87

Report on Tidal Observations on the Humber. Presented by James

Oldham, C.E.; John Scott Russell, C.E., F.R.S.; J. F. Bateman,

C.E., F.R.S.; and Thomas Thompson 101

On Rifled Guns and Projectiles adapted for Attacking Armour-plate

Defences. By T. Aston, M.A., Barrister-at-Law 103

Extracts, relating to the Observatory at Kew, from a Report presented

to the Portuguese Government by Dr. Jacintho Antonio De Souza,

Professor of the Faculty of Philosophy in the University of Coimbra.

(Communicated by J. P. Gassiot, F.R.S.) 109

Report on the Dredging of the Northumberland Coast and Dogger Bank.

Drawn up by Henry T. Mennell, on behalf of the Natural History

Society of Northumberland, Durham, and Newcastle-on-Tyne, and

of the Tyneside Naturalists' Field Club 116

Report of the Committee appointed at Manchester to consider and report

upon the best means of advancing Science through the agency of the

Mercantile Marine. By Cuthbert Collingwood, M.B., F.L.S 122

Provisional Report of the Committee, consisting of Professor A. Wil-

Liamson, Professor C. Wheatstone, Professor W. Thomson, Professor

W. H. Miller, Dr. A. Matthiessen, and Mr. Fleeming Jenkin, on

Standards of Electrical Resistance 125

Preliminary Report of the Committee for Investigating the Chemical and

Minoralogical Composition of the Granites of Donegal, and the Mine-

rals associated with them 163

On the Vertical Movements of the Atmosphere considered in connexion

with Storms and Changes of Weather. By Henry Hennessy, F.R.S.,

M.R.I.A., &c, Professor of Natural Philosophy in the Catholio Uni-

versity of Ireland 165

Report of a Committee, consisting of the Rev. Dr. Lloyd, General Sabine,

Mr. A. Smith, Mr. G. Johnstone Stoney, Mr. G. B. Airy, Professor

Donkin, Professor Wm. Thomson, Mr. Cayley, and the Rev. Professor

Price, appointed to inquire into the adequacy of existing data for

carrying into effect the suggestion of Gauss, to apply his General

Theory of Terrestrial Magnetism to the Magnetic Variations 170

On Thermo-electric Currents in Circuits of one Metal. By Fleeming

Jenkin. (Plate I.) 173

On the Mechanical Properties of Iron Projectiles at High Velocities. By

W. Fairbairn, F.R.S 178

Report on the Progress of the Solution of certain Special Problems of

Dynamics. By A. Cayley, F.R.S., Correspondent of the Institute.. 184

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