PLATES. 



I. Illustrative of JIjM. Wiedemann and Franz's Paper on the Conducti- 



bility of Metals for Heat. 

 II. Illustrative of Prof. Weber's Pa])er on the Applieation of Magnetic 

 Induction to the determination of the Magnetic Inclination. 



III. Illustrative of Mr. W. J. M. Rankine's Paper on the Mechanical 



Action of Heat ; Prof. Grassmanu's Paper on the Theory of Com- 

 ]iound Colours ; and Mr. T. Dobson's Paper on the Storm-tracks 

 of the South Pacific Ocean. 



I V. Illustrative of Prof. Magnus's Paper on an Apjiaratus for the Illustra- 



tion of various phaenomena of Rotating Bodies. 



V. Illustrative of Mr. S. V. Wood's Paper on some Tubulai- Cavities in 

 the Coralline Crag at Sudbourn and Gedgrave, near Orford. 



VI, Illustrative of M. R. Kohlrausch's Theory of the Electric Residue in 

 the Leyden Jar. 



ERRATUM 



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