LIST OF ILLUSTRATIONS. 



STEEL PLATES. 



JAMES CLERK MAXWELL. Engraved by Stodart, after a 



Photograph, by Fergus of Greenock . . Frontispiece. 



JOHN CLERK MAXWELL, Mi. 66. Engraved by Stodart, 



after Sir John Watson Gordon, E. A. . To face page 1 1 



Mrs. CLERK MAXWELL AND "BoY." Engraved by Stodart, 



after William Dyce, E.A. .. To face page 29 



LITHOGRAPHS. 



FACSIMILE LETTER . . To face page 58 



THE VAMPYRE, COMPYLT INTO MEETER, BY JAS. CLERK 



MAXWELL . . To face page 70 



COLOURED PLATES. 

 DIAGRAM SHOWING THE RELATIONS OF LIGHT To face page 47 '3 



DIAGRAM ILLUSTRATING THE CHROMATIC RELATIONS OF 



COLOURED PAPERS . To face page 47 '4 



