XVI. Experiments on Muriatic Acid Gas, with Observations
on its Chemical Constitution, and on some other
Subjects of Chemical Theory. By John Murray,
M. D. F. R. S. Edin.
XVII. Experiments on the Relation between Muriatic Acid
and Chlorine; to which is subjoined the Descrip-
tion of a New Instrument, for the Analysis of
Gases by Explosion. By Andrew Ure, M. D.
Professor of the Andersonian Institution, and
Member of the Geological Society,
XVIII. On the Laws which regulate the Distribution of the
Polarising Force in Plates, Tubes, and Cylinders
of Glass, that have received the Polarising Struc-
ture. By David Brewster, LL. D. F. R. S. Lond.
and Edin.
XIX. Remarks, illustrative of the Scope and Influence of
the Philosophical Writings of Lord Bacon. By
Macvey Napier, Esq. F. R. S. Lond. & Edin.
vnd F. A. S. Edin.
XX. Sketch of the Geology of the Environs of Nice. By
Thomas Allan, Esq. F. R. S. Edin.
XXI. On certain Impressions of Cold transmitted from the
Higher Atmosphere, with the Description of an
Instrument adapted to measure them. By John
Leslie, F. R. S. Edin. and Professor of Mathema-
tics in the University of Edinburgh.