COmEmS—{co7itimied). 



Fehrtiary 22, 1877. 



PAGE 



I. On Crookes's Force. By G-. Johnstone Stoney, M.A., F.E.S., and Eichaed 



J. Moss, F.C.S 553 



II. On the Structure of Magelona. By W. C. M'Intosh, M.D., F.E.S.E., 



r.L.S 559 



III. On a new Form of Tangential Equation. By John Casey, LL.D., F.E.S., 



Professor of Higher Mathematics in the Cathohc University of Ireland . . 564 



lY. Addition on the Bicircular Quartic. By A. Cayley, LL.D., F.E.S., Sadlerian 



Professor of Mathematics in the University of Cambridge 565 



T. On the Influence of Height in the Atmosphere on the Diurnal Variation of 



the Earth's Magnetic Force. By J. A. Beodn, F.E.S 566 



YI. On Heat as a Germicide when Discontinuously Applied. By John Tyndaxl, 



F.E.S. 569 



List of Presents 570 



On the Variations of the Daily Eange of Atmospheric Temperature as recorded 

 at the Kew Observatory. By Balfotje Stewart, LL.D., F.E.S., Professor 

 of Katural Philosophy at Owens College, Manchester 577 



Index 593 



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 Six vols., 4to. Per vol. : 20s., cloth ; 28s., half-morocco. 

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