Vlll 



Lid of the Confribiifors. 



Stoney, Geoege Johnstone, D.Sc, F.E.S. 



On Gearing for Bicycles and Tricycles, .... 



On Modes of Dealing with Echoes in Eoonis, 



On Equal Temperament, and the Cause of the Effect upon 

 Piano Music produced by the Key in which it is set, . 



On the Possibility of Prolonging the Tones of a Piano- 

 forte so as to produce an Instrument with the Quality 

 of Tone of the Piano, and the Continuity of Tone of 

 the Organ, ........ 



TicHBORNE, C. E. C, LL.D., F.C.S. 



On an Argentiferous Galenetic- Blende at Ovoca, . 



20 

 53 



59 



147 



300 



Thomson, Jocelyn H., Lieut. E.A. 



Curious Numerical Eelations of the Musical Scale, 



152 



Wilson, W. E., F.E.S.A. 



Notes on the Transit of Venus, as observed at Streete, 

 County Westmeath, ....... 



51 



DATES OF THE PUBLICATION OF THE SEVEEAL PAETS 

 OF THIS VOLUME. 



Part 1. — Containing pages 1 to 68. 

 2. „ „ 59 to 116. 



3. 



4. 

 5. 

 6. 



7. 



117 to 154. 

 155 to 196. 

 197 to 240. 

 241 to 344. 

 345 to 436. 

 437 to 462. 

 463 to 546. 



(April, 1883.) 

 (July, 1883.) 

 (Oct., 1883.) 

 (Jan., 1884.) 

 (July, 1884.) 

 (Jan., 1885.) 

 (April, 1885.) 

 (July, 1885.) 

 (Oct., 1885.) 



