iv List of Contributors. 



Dixon, G. Y., M.A. page 



Eemarks on Sagartia venusta and Sagartia nivea, . . .111 



Dixon, G. Y., and Dixon, F. 



Notes on Bunodes thallia, Bunodes verrucosa, and Tealia 

 crassicornis (Plates IV. and V.), . . . . .310 



Draper, Harry Napier, F.C.S. 



On the Percentage Eelating to Absolute Alcohol and Proof 

 Spirit of the Alcoholic Beverages in Ordinary Use (Plate 

 VIII.), 372 



FitzGerald, George F., M.A., F.E.S. 



Note on the Origination of Turbulent Motion in Viscous 

 Liquids, 289 



FitzGerald, George F., M.A., F.E.S. , and Joly, J., M.A. 



On the Measurement of Small Pressures, .... 128 



Grubb, Sir Howard, F.E.S. 



On a Heliostat for the Smithsonian Institution, Washington 

 (Plate XIII.) , 598 



Hartley, W. N., F.E.S. 



On the Constitution of Electric Sparks (Plates VI. and VII.), 363 



Hull, Edward, LL.D., F.E.S. 



On the Temperature of the Water of Ballynoe Springs, near 

 Queenstown, 307 



Hyland, J. Shearson, Ph.D., M.A. 



On some Epi-Diorites of N.-W. Ireland, .... 405 



On the Mesolite (Galactite) of Henbane Head, Co. Antrim, 411 

 On some Spherulitic Eocks from Co. Down, . . , 420 

 On some specimens jfrom Wady Haifa, Upper Egypt, . . 348 





