CONTENTS. 



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 



II. 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. k E. Professor of Na- 

 tural Philosophy in the University of Edinburgh, - 27 



III. 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 mew 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- 



fore examined. By Arthur Connell, Esq. F. R. S. Ed. 46 



V. Researches on the Vibrations of Pendulums in Fluid Media. 

 By George Green, Esq. Communicated by Sir Ed- 

 ward Ffrench Bromhead, Bart. M.A., F.R.SS. Lond. 

 Lond. & Ed. - - .- - - . 54 



VI. On the Force of the Latin Prefix Vae or Ve in the Composi- 

 tion of Nouns and Adjectives. By the Rev. Archdeacon 

 Williams, F. R. S. Ed. Rector of the Edinburgh Academy, 63 



