List of the Contributors. Vii 
Moss, Ricuarp J., F.C.S. PAGE 
On the Oxidation of Iron in the presence of Vartry 
Water, . ; ; 5 : , F : s hae 
An Improved Method for Determining the Gases Dissolved 
in Water (with a Woodcut), , , ; : Dat 
iM Cay. W.8., M.A. F-T-C.D.: 
On the Method of Charging Holtz’s Electrical Machine, . 209 
M‘Donne., A., M.A., M.1.C.E. 
On the Transmission of Power to a distance, . , ; 1 
M‘Nas, W.R., M.D., F.L.S. 
On Branched Hairs from the Stamens ot Tradescantia 
virginica (with Plate 20), . A , : : 1) 289 
On some Abnormal Flowers of Primula, : : ss 290 
Note on the Root-hairs of Azolla pinnata, . : . aol 
Ornemiy, J. P.-C. 
On the Occurrence of Microcline Feldspar in the Dalkey 
Granites (with Plate 15), . : : : : . 246 
PLUNKETT, THOMAS. 
On Chertin the Limestone of Knockbeg, county Fermanagh 
(with Woodeut), : t © pearl 
Reaves, T. Metiarp, C.E. 
A Problem for Irish Geologists in Post-Glacial Geology 
(with Plate 19), ‘ ; : P . ; 255 
Reynowps, J. Emerson, M.D., F.R.S., and Babi, V., M.A. 
On an Artificial Mineral produced in the Manufacture ot 
Basic Bricks at Blaenavon, Monmouthshire, ; ta 
Sincuarr, F. W. 
Notes on Irish Lepidoptera, . A : : A A eM, 
Stoney, G. J., M.A., F.R.S. 
Approximate Formule for the Volumes and Weights of 
Gases, . ; ¢ ; : : . : . 484 
On a Dimerous Form of Pansy (with Woodcut), . . 632 
