LIST OF ILLUSTRATIONS.

STEEL PLATES.
JAMES CLERK MAXWELL. Engraved by Stodart, after a
Photograph by Fergus of Greenock
Frontispiece.
John Clerk Maxwell, Æt. 66. Engraved by Stodart,
after Sir John Watson Gordon, R.A.
To face page 11
Mrs. Clerk Maxwell and “Boy.” Engraved by Stodart,
after William Dyce, R.A.
To face page 29
LITHOGRAPHS.
Facsimile Letter To face page 58
The Vampyre, Compylt into Meeter, by Jas. Clerka
Maxwell
To face page 70
COLOURED PLATES.
Diagram showing the Relations of Light To face page 473
Diagram illustrating the Chromatic Relations of
Coloured Papers
To face page 474
Chromatic Effects of a Pentagon of Unannealed Glass
in Polarised Light
To face page 487
Isochromatic Lines In A Triangle Of Unannealed
Glass
To face page 487
Diagram Showing The Colours Exhibited By A Plate Of
Gelatine When Exposed To A Torsional Shear
To face page 491