CONTENTS, 
XI. On the Amount of the Radiation of Heat, at night, from the Earth, and from 
various bodies placed on or near the surface of the Earth. By James 
Glaisher, Esq., of the Royal Observatory at Greenwich. Communicated by 
G. B. Airy, Esq., F.R.S., Astronomer Royal, fyc page 119 
XII. On the Cause of the Discrepancies observed by Mr. Baily with the Cavendish 
Apparatus for determining the mean density of the Earth. By George 
Whitehead Hearn, Esq., of the Royal Military College, Sandhurst. Com- 
municated by Sir J. F. W. Herschel, Bart., F.R.S 217 
XIII. Electro-Physiological Researches. — Fifth Series. Part I. Upon Induced Con- 
tractions. Part II. On the Phenomena elicited by the passage of the Current 
through the Nerves of a living Animal, or an Animal recently killed, according 
to the Direction of the Current. By Signor Carlo Matteucci, Professor in 
the University of Pisa, fyc. fyc. Communicated by Michael Faraday, Esq., 
F.R.S. , fyc. $c 231 
XIV. Electro-Physiological Researches. — Sixth Series. Laws of the Electric Discharge 
of the Torpedo and other Electric Fishes — Theory of the production of Electricity 
in these Animals. By Signor Carlo Matteucci, Professor in the University of 
Pisa, 8$c. 8fc. Communicated by Michael Faraday, Esq., F.R.S., 8fc. fyc. 239 
XV. Electro-Physiological Researches. — Seventh and last Series. Upon the relation 
between the intensity of the Electric Current, and that of the corresponding 
physiological effect. By Signor Carlo Matteucci, Professor in the University 
of Pisa, 8fc. Sfc. Communicated by Michael Faraday, Esq., F.R.S., 8$c. 8$c. 243 
XVI. On the V alue in Absolute Alcohol of Spirits of different Specif c Gravities. By 
George Fownes, Esq., F.R.S., Professor of Practical Chemistry in University 
College, London 249 
XVII. On different properties of Solar Radiation producing or preventing a deposit of 
Mercury on Silver Plates coated with Iodine, or its compounds with Bromine or 
Chlorine, mod fed by coloured Glass media and the Vapours of the Atmosphere . 
By A. Claudet ,Esq. Communicated by Sir David Brewster, F.R.S., fyc. fyc. 253 
Index 263 
Appendix. 
Presents f 1 1 
