CONTENTS. 



1. On the Means of realizing the Advantages of the Air- 



Engine. By William John Macquorn Rankine, 

 Civil Engineer, F.R.SS. Lond. and Edin., &c, . 1 



2. On the Intrusion of the Germanic Races into Europe. By 



Daniel Wilson, LL.D., Professor of History and 

 English Literature, University College, Toronto. 

 Communicated by the Author, . . .33 



3. On the Hyposulphites of the Organic Alkaloids. By 



Henry How, Professor of Chemistry and Natural 

 History, King's College, Windsor, Nova Scotia, 47 



4. On some of the more recent changes in the Area of the 



Irish Sea. By the Rev. J. G. Cumming,M.A.,F.G.S., 

 Vice-President of King William's College, Castletown, 

 Isle of Man, ..... 57 



5 . On the Chemical Composition of some Norwegian Minerals. 



By David Forbes, F.G-.S., A.I.C.E., . . 62 



6. On Mineral Charcoal. By Professor Harkness, . 71 



7. On a Simple Variation Compass. By William Swan, 



F.R.S.E., 76 



8. Notes on some Substances which exhibit the phenomena 



of Fluorescence. By Dr J. H. Gladstone, in a Let- 

 ter to Dr Anderson, . , . .83 



