IV 
CONTENTS. 
Page. 
The Rev. James William M’Gauley’s Inquiry into the Possibility and 
Advantage of the Application of Magnetism as a Moving Power, with 
Remarks on the Nature of Magnetism. 20 
Mr. R. W. Fox on a new Dipping Needle. 25 
Capt. Sabine’s Account of Hansteen’s Researches in Magnetism. 25 
Capt. Sabine and Prof. Lloyd’s Account of Magnetic Observations in 
Ireland. 25 
Mr. W. Snow Harris’s Results of three Years and a half hourly Obser¬ 
vations of the Thermometer at Plymouth. 25 
Lieut-Col. Sykes on the Measurement of Heights by common Ther¬ 
mometers . 25 
Mr. W. Gray and Prof. Phillips’s Third Series of Experiments on the 
Quantities of Rain at different Heights in the Atmosphere. 27 
Dr. Apjohn on the Wet Bulb Hygrometer. 27 
The Rev. W. Whewell on a New Anemometer. 29 
Mr. F. Daily’s Account of the Measurement of the Aberdeen Standard 
Scale. 29 
CHEMISTRY.—ELECTRICITY. 
Dr. J ames Apjohn on the Specific Heats of the permanently elastic 
Fluids. 30 
Mr. R. W. Fox on the absence of Magnetism in Cast Iron when in 
fusion. 33 
Dr. William Barker on Electric Currents passing through Platina 
Wire. 33 
Mr. Edmund Davy’s Account of some Experiments recently made on 
the Buoys in Kingstown Harbour, with a view to protect from the 
action of Sea Water the Metals, and especially the Iron-work, at¬ 
tached to them. . 34 
Mr. Edmund Davy on some recent experiments made with a view to 
protect Tin Plate or tinned Iron from corrosion in Sea-water, with 
some probable applications; and on the power of Zinc to protect other 
Metals from corrosion in the Atmosphere. 36 
Mr. Edmund Davy on the comparative value of Irish and Virginian To¬ 
bacco. 37 
Mr. Edmund Davy on Nicotin and some of its Combinations. 38 
Mr. M. Scanlan on a Fluid obtained in the manufacture of Pyroxylic 
Spirit. 40 
Mr. Arthur Connell on the Chemical Constitution of Fossil Scales, as 
illustrative of the nature of the Animals from which they have been 
derived. 41 
Dr. Robert J. Kane on the Composition and Properties of the Salts of 
Sulpho-Methylic Acid.. 42 
Dr. Robert J. Kane on some combinations of Protochloride of Platina 
with Protochloride of Tin.... 44 
