VI CONTENTS. 



ARTICLE PAGE 



X, — Note Oil the Identity of the Spectra obtained from the 

 different AUotropic Forms of Carbon. By Arthur 

 ScHUBTER, Ph.D., F.E.S., and H. E. Roscoe, LL.D., 

 F.K.S 80 



XI. — On the Anal Eespiration of the Copepoda. By Marcus M. 



Hartog, M.A., B.Sc, F.L.S 83 



XII.— The Eadiograph. By D. Winstanley, F.E.A.S 86 



XIII. — On an Extension of the ordinary Logic, connecting it with 

 the Logic of Eelatives. By Joseph John Murphy, F.G.S. 

 Communicated by the Eev, Egbert Harley, F.E.S 90 



XIV. — The Word " Chemia " or " Chemistry." By E. Angus Smith, 



Ph.D., F.E.S. &c loi 



XV. — Notes on a Bore through Triassic and Permian Strata, 

 lately made at Openshaw. By E. W. Binney, V.P., 

 F.E.S., &c 126 



XVI. — On an Adaptation of the Lagrangian Form of the 

 Equations of Fluid-Motion. — Part I. By E. F. Gwy- 

 tuee, M. a 130 



XVII. — The Literary History of Parnell's ' Hermit.' By William 



E. A. Axon, M.E.S.L., &c 14+ 



XVIII. — On the Long-period Inequality in Eainfall. By Balfour 

 Stewart, LL.D., F.E.S., Professor of Natural Philosophy 

 at the Owena College, Manchester 161 



XIX. — On a Form of representing the Velocity at any Point of an 

 Incompressible Fluid under ConserTative Forces. By E, 



F. GWYTHER, M.A 169 



XX. — Notes on some Quaternion Trausfoi'mations. By E, F. 



GWYTHER, M.A 1 74 



XXI. — Colorimetry. — Part IV. By James Bottomley, D.Sc 177 



XXII. — Colorimetry. — Part V. On the Absorption of Light by 



Turbid Solutions. By James Bottomley, D.Sc 187 



XXIII. — On the Conditions of the Motion of a Portion of Fluid 

 in the Manner of a Eigid Body. By E. F. Gtwythek, 

 M.A 199 



