CONTENTS. 
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PART I. 
Page 
I. On the Investigation of Magnetic Intensity by the Oscillations 
of the Horizontal Needle. By W. Snow Harris, Esq. 
F.R.SS. Lond. & Ed. - - - - 1 
Il. An Account of some Experiments on the Electricity of Tour- 
maline, and other Minerals, when exposed to Heat. By 
James D. Forbes, Esq. F.R. SS. L. & E. Professor of Na- 
tural Philosophy in the University of Edinburgh,  - 27 
Ill. A General View of the Phenomena displayed in the Neigh- 
bourhood of Edinburgh by the Igneous Rocks, in their Rela- 
tions with the Secondary Strata ; with reference to a more 
particular description of the Section which has been ex- 
posed to view on the south side of the Castle Hill. By 
Major-General Lord Greenock, C.B., F.R.S. Ed. 39 
IV. Description and Analysis of a, Mineral from Faroe, not be- 
Jore examined. By ArruurR ConneELL, Esq. F.R.S. Ed. 46 
V. Researches on the Vibrations of Pendulums in Fluid Media. 
By Grorce Green, Esq., Communicated by Sir Ep- 
Warp Frrenco Bromueap, Bart. M.A., F.R.SS. Lond. 
Lond. & Ed. - - - - - - 54 
VI. On the Force of the Latin Prefix Ve or Ve in the Composi- 
tion of Nouns and Adjectives. By the Rev. Archdeacon 
Wiurams, F.R.S. Ed. Rector of the Edinburgh Academy, 63 
