K CONTENTS. 



TUESDAY, AUGUST 29. 



Page 



1. Heport of the Committee for constructing and issuing practical Standards 



for use in Electrical Measurements 404 



2. Suggestions regarding the Extension of the Practical System of Units. 

 ByDr. C. W. Siemexs, F.R.S 4G4 



3. On a new Form of Galvanometer for Measui-ing Currents and Potentials 



in Absolute Units. By Professor Sir William Thomson, F.E.S 4G4 



4. On Electric Meters. By C. Vernon Bots 464 



5. On a new Electrical Contact Maker. By Professor H. S. Hele Shaw ... 4G5 



6. On a Machine for ruling large Diffraction Gratings. By A. Mallock ... 4GG 



7. A Numerical Estimate of the Rigidity of the Earth. By G. II. Daewin, 



F.RS : 472 



8. On the Transmission of Force through an Elastic Solid. By Professor 



Sir William Thomson, F.R.S 474 



0. On a Method of investigating Magnetic Susceptibility. By Professor 



Sir William Thomson, F.E.S '. 474 



WEBNESDAT, AUGUST dO. 



1. On a Method of investigating experimentally the Absorption of Radiant 

 Heat by Gases. By Professor Tait, Sec. R.S.E. (From a letter to Sir 



W. Thomson) 475 



2. On Atmospheric Electricity. By Professor 0. Michie Smith, B.Sc, 

 F.R.S.E. : '. : ! 47C 



3. On tlie Alteration in the Dimensions of the Magnetic Metals by tlie act 



of Magnetisation. By Professor W. F. Baereti, F.R.S.E 47G 



4. On an Instrument for measuring the Intensity of Aerial Vibration. By 

 Professor Lord Ratleigh, F.R.S 477 



•5. On the Effect of Wind on the Draught of Chimneys. By Professor 

 Lord Ratleigh, F.R.S '. 477 



6. On a Mechanical Self-registering Thermometer. By A. Mallock 477 



7. On a Musical Instrument. By J. Philips 478 



8. On an Arithmetical Model. By Sir F. J. Beam^vell, F.R.S 478 



Section B.— CHEMICAL SCIENCE. 



THURSBA Y, A UG UST 24. 



Address by Professor G. D. Livelng, M.A., F.R.S., F.C.S., President of the 



Section , 479 



1. On the Legal Flashing Test for Petroleum. By F. A. Abel, C.B.. F.R.S., 

 i-.O.S 486 



2. The Influence of Aqueous Vapour on the Explosion of Carbonic Oxide 



and Oxygen. By H. B. Dixon, M.A 486 



3. The Velocity ot Explosion of a Mixture of Carbonic Oxide and Oxygen 

 with varying quantities of Aqueous Vapour. By H. B. Dixon, M.A. ... 487 



