416. 
A Third Memoir on Skeiv Surfaces, otherwise Scrolls 
Phil. Trans, t. clix. (for 1869), pp. Ill—126 
A Memoir on the Theory of Reciprocal Surfaces . 
Phil. Trans, t. clix. (for 1869), pp. 201—229 
A Memoir on Cubic Surfaces . . ... . 
Phil. Trans, t. clix. (for 1869), pp. 231—326 
A Memoir on Abstract Geometry ...... 
Phil. Trans, t. clx. (for 1870), pp. 51—63 
On Polyzomal Curves, otherwise the Curves J U + J V + &c. = 0 . 
Trans. R. Soc. Edinburgh, t. xxv. (for 1868), pp. 1—110 
Corrections and Additions to the Memoir on the Theory of Reci 
procal Surfaces ......... 
Phil. Trans, t. clxii. (for 1872), pp. 83—87 
On the Theory of Reciprocal Surfaces . ... . 
Addition to Salmon’s Analytic Geometry of Three Dimensions, 4th ed. 
(1882), pp. 592—604 
Notes and References to papers in Volume VI. . 
Portrait ........ 
593 
to face Title.