Vibrations of Rifle Barrels. 



327 



June 6, 1901. 



A List of the Presents received was laid on the table, and thanks 

 ordered for them. 



The following Papers were read : — 



I. " On the Electric Response of Inorganic Substances. Preliminary 

 Notice." By Professor J. C. Bose. Communicated by Sir 

 M. Foster, Sec. R.S. 



II. "On Skin Currents. Part I. — The Frog's Skin." By Dr. 

 A. D. Waller, F.R.S. 



III. "Vibrations of Rifle Barrels." By A. Mallock. Communi- 



cated by Lord Rayleigh, F.R.S. 



IV. " The Measurement of Magnetic Hysteresis." By G. F. C. 



Searle and T. G. Bedford. Communicated by Professor 

 J. J. Thomson, F.R.S. 



V. " A Conjugating ' Yeast.' " By B. T. P. Barker. Communi- 

 cated by Professor Marshall Ward, F.R.S. 



VI. " Thermal Adjustment and Respiratory Exchange in Mono- 



tremes and Marsupials : a Study in the Development of 

 Homo-thermism." By Professor C. J. Martin. Communi- 

 cated by E. H. Starling, F.R.S. 



VII. " On the Elastic Equilibrium of Circular Cylinders under certain 



Practical Systems of Load." By L. N. G. Filon. Commu- 

 nicated by Professor Ewing, F.R.S. 



VIII. " The Measurement of Ionic Velocities in Aqueous Solution, and 

 the Existence of Complex Ions." By B. D. Steele. Com- 

 municated by Professor Ramsay, F.R.S. 



" Vibrations of Rifle Barrels."* By A. Mallock. Communicated 

 by Lord Rayleigh, F.R.S. Received May 2, — Read June 6, 

 1901. 



It has long been known that a shot fired from a rifle does not in 

 general start from the muzzle in the direction occupied by the axis of 

 the barrel at the first moment of ignition of the charge. 



* The greater part of the notes from which this paper is drawn were made in 

 1898, but since that time the interesting experiments of Messrs. Cranz and Koch, 

 of Stuttgart, on the same subject have been published, and I have looked through 

 my notes again and put them in their present form, as it may be of some interest 

 to compare results obtained in such different ways. 



