CONTENTS.

20.-The Absorption of Heat in the Solar Atmosphere. By W. E. WILSON,
M.R.I.A., and A. A. RAMBAUT, M.A., D.Sc., .
21.-Report on the Botany of the Mourne Mountains, County Down. By
SAMUEL ALEXANDER STEWART, F.B.S., Edinburgh; and R. LLOYD
PRAEGER, B.E., M.R.I.A.,

22.-On "Sickles" (so called) of Bronze, found in Ireland: with a List of
those already discovered. By W. FRAZER, F.R.C.S.I., M.R.I.A.
(Plates XII. and XIII.),

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299

335

381

391

23.-Report on some Species of the Genera Buccinum, Buccinopsis, and Fusus, Dredged off the South-West of Ireland. By HENRY K. JORDAN, F.G.S., 24.-Some New Anthropometrical Instruments. By C. R. BROWNE, M.B.,. 397 25.-Note on some Cinerary Urns found at Tallaght, County of Dublin. By T. H. LONGFIELD, F.S.A. (Plate XIV.), .

26.-On a New Species of Earth-worm. By the Rev. HILDERIC FRIEND,

27.-Notes on Newtonian Chemistry. By Rev. SAMUEL HAUGHTON, M.D.,
S.F.T.C.D. (Note II.-Ternary Compounds), .
28.-Notes on Newtonian Chemistry. By Rev. SAMUEL HAUGHTON, M.D.,
S.F.T.C.D. (Note III.-Quaternary Compounds),

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[Minutes of the Meetings of the Academy, from April 11, 1892, to

November 30, 1892, .

Dublin: Printed at the University Press, by PONSONBY & WELDRICK,

Printers to the Academy.

101-128]

HARVARD COLLEGE LIBRARY

XXIX.

ÚCT 12 1896

CAMBRIDGE MASS

NOTES ON NEWTONIAN CHEMISTRY. BY RESUEL

HAUGHTON, M.D.

[Read APRIL 11, 1892.]

NOTE IV.-QUINARY COMPOunds.

(Marsh Gas Type.)

1. Marsh Gas.-The last of Mendelejeff's typical compounds is marsh gas, in which an atom of the element carbon combines with four atoms of hydrogen.

I commence my discussion by recapitulating the essential mechanical equations which regulate the compounds of all classes, monads, dyads, triads, tetrads.

Let X be any element whose atomic weight is ẞ.