CONTENTS. 



V — 



AETIOLE PAGE 



I. — On the Origin of Colour, and the Theory of Light, By 



John Smith, Perth Academy i 



II. — On a Method of Testing the Strength of Steam Boilers. 



By J. P. JoxTLE, LL.D., F.E.S., &c 97 



III. — Experiments on the Total Heat of Steam. By J. P. Jottle, 



LL.D., F.E.S,, &c 99 



IV. — Experiments on the Passage of Air through Pipes, and 



Apertures in thin Plates. By J. P. Jottle, LL.D., 

 F.E.S., &c 102 



V. — Supplementary Researches in the Higher Algebra. By 



James Cockle, M.A., E.E.A.S., F.C.P.S., Barrister- 

 at-Law 108 



VI. — Eemarks on the Australian Grold Fields. By W. S. 



Jevons 115 



VTI. — On the Vestiges of Extinct Glaciers in the Highlands of 

 Great Britain and Ireland. By Edwaed Hull, 

 F.G.S. of the Geological Survey of Great Britain 131 



VIII. — A Brief Memoir of the late John Kennedy, Esq. By 



William Faiebaien, Esq 147 



IX. — Suggestions for a New Form of Floating Lightship, and a 



mode of estimating the distances of Lighthouses. By 

 Aleeed Fetee 158 



X. — On the Influence of Atmospheric Changes upon Disease. 



By Aethtte Eai^-some, M.B., B. A. Cantab. M.E.C.S., 

 and Geoege V. Vbekon, F.E.A.S., M.B.M.S 164 



XI. — On the Phenomena of Groups of Solar Spots. By Joseph 



Baxendell, F.E.A.S 186 



XII. — On the Eotation of Jupiter. By J oseph Bj^ndell, 



F.E.A.S .(..;... 194 



XIII. — On the Estimation of Sugar in Diabetic Urine by the 



Loss of Density after Fermentation. By William 

 -Eobeets, M.D. London, Physician to the Manchester 

 Royal Infirmary 200 



