[ xii ] 
Vm. On Periodical Lawn discoverable in the mean effects of the larger Magnetic 
Disturbances. — No. II. Colonel Edward Sabine, R.A., Treas. and 
r.P.R.S page 103 
IX. On the Lunar Atmospheric Tide at Singapore. By Captain C. M. Elliot, Madras 
Engineers, F.R.S 125 
X. Discovery that the Veins of the Bat's LVing {which are furnished with valves) are 
endowed with rythmical contractility, and that the onward flow of blood is 
accelerated by each contraction. By T. Wharton Jones, F.R.S. , Fulleiuan 
Professor of Physiology in the Royal Institution of Great Britain, Ophthalmic 
Surgeon to University College Hospital, Corresponding Member of the Society 
of Biology of Paris, &^c. 8fc 131 
XI. Experimental Researches in Electricity . — Twenty-ninth Series. By Michael 
Faraday, Esq., D.C.L., F.R.S. ,Fullerian Prof. Chon. Royal Institution, Foreign 
Associate of the Acad. Sciences, Paris, Ord. Boruss. Pour le Mdrite, Eq., 
Memb. Royal and Imp. Acadd. of Sciences, Petersburgh, Florence, Copenhagen, 
Berlin, Gottingen, Modena, Stockholm, Munich, Bruxelles, Vienna, Bologna, 
cS’c. 137 
XII. On the Symbolic Forms derived from the Conception of the Translation of a 
Dh •ected Magnitude. By the Rev. M. O’Brien, M.A., late Fellow of Caius 
College, Cambridge, and Professor of Natural Philosophy and Astronomy in 
Kinfs College, London 161 
ERRATA. — Part II. 1851. 
In equations 11, 12, 13, L5, 16, 17, 18, 19, 23, 24,/or H, + H. read 
In equation 19, /or /x read ^ /x. 
In page 620, omit the third, fourth and fifth lines 
