﻿THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE 



AND 



JOURNAL OF SCIENCE. 



[FOURTH SERIES.] 



JUNE 1871. 



LV. On Approach caused by Vibration. By various Authors. 

 Edited by Frederick Guthrie. 



To the Editors of the Philosophical Magazine and Journal. 

 Gentlemen, 



THE following communication is divided into three parts, as 

 follows : — 

 Part I. Synthetical View of the Forms and Forces of Matter. 

 By Dr. Jules Guyot. 



Part II. Acoustic Repulsion and Attraction. By K. H. 



SCHELLBACH. 



Part III. Approach caused by Vibration, being five Letters 

 addressed to me by Sir William Thomson. 



Dr. Guyot' s paper was first brought to my notice on read- 

 ing II err Shellbach's second paper. On turning to the ori- 

 ginal I found that Dr. Guyot had anticipated so many of Herr 

 Shellbach's and my own experimental results, that it became 

 an obvious duty on my part to bring Dr. Guyot's claim to be 

 the experimental discoverer of this highly interesting class of 

 phenomena before your readers, to most of whom Dr. Guyot' s 

 experiments may be as unfamiliar as they were a short time ago 

 to myself. 



Your readers will also certainly be interested in Herr Shell- 

 bach's experiments on acoustic repulsion and attraction. It 

 appears from Herr Shellbach's paper No. 1 that his experiments 

 therein described were performed independently of, and nearly at 

 the same time as mine. Herr Schellbach's papers 2 and 3 are 

 specially interesting, as they bear upon the conclusions drawn 

 by Sir W. Thomson concerning the same subject. 



Phil. Mag. S. 4. Vol. 41. No. 275. June 1871. 2E 



