viii 
List of the Contributors. 
81GERSON, George, M.D., F.L.S. page. 
Micro-Atmospheric Researches (Plates iv. to x.), . . . 13-22 
Anomalous Form of Corolla in Erica tetralix, . . . . 191 
Additions to the Flora of the Tenth Botanical District in 
Ireland (Plate xvii.), 192 
Discovery of Fish remains in the alluvial clay of the River 
Foyle, with observations on the existence and disappearance 
of an npper Lough Foyle ; and on the former Insulation of 
Derry and Inishowen, .212 
Stoney, G. Johnstone, M.A., F.R.S. 
On the Cause of the Interrupted Spectra of Gases (abstract), . 107 
On a new form of Spectroscope, ...... 208 
On the Reduction of Daily Weather Reports, . . . 253 
Sullivan, W. K., Ph. D. 
On the Formation of Thenardite in connexion with the date of 
the Glacial Period and the temperature that prevailed during 
it, as deduced from the influence of the Eccentricity of the 
Earth's Orbit on the length of summer and winter in 
Aphelion and Perihelion, 2 
Note on the Hornblende and Augite groups of Minerals, . 37 
Sullivan, W. K., Ph. D., and O'Reilly, J. P., C.E. 
Note on the Great Dolomite Bed of the North of Spain, in 
connexion with the Tithonic Stage of Herr Opel (Plate xviii.), 225 
TiCHBOENE, C. R. C, F.C.S. 
Laboratory Notes, . . . . . . . . .105 
Report on the Molecular Dissociation by Heat of Compounds in 
Solution (Plates xv. and xvi.), . . . . . 169 
On the Action of Heat upon Solutions of Hydrated Salts (Plate 
xix.), . . . . . . . . . .247 
Webber, F. X. J. 
On the Floatation of Sand on the River Ganges, . . . 252 
Wright, Edward Perceval, M.D., F.L.S. 
On the Structure and Mode of Life of Hyalonema Lusitanicum, 
Bocage, 549 
