36 
Contents of Volume VII. 
446. On the Mechanical Description of a Noclal Bicircular Quartic 
Proc. Lond. Math. Society, t. hi. (1869—1871), pp. 100—106 
447. On the Rational Transformation between Two Spaces 
Proc. Lond. Math. Society, t. in. (1869—1871), pp. 127—180 
448. Note on the Cartesian with Two Imaginary Axial Foci. 
Proc. Lond. Math. Society, t. in. (1869—1871), pp. 181, 182 
449. Sketch of recent researches upon Quartic and Quintic Sur 
faces ........... 
Proc. Lond. Math. Society, t. ill. (1869—1871), pp. 186—195 
450. Note on the Theory of the Rationed Transformation between 
Tivo Planes, and on Special Systems of Points 
Proc. Lond. Math. Society, t. hi. (1869—1871), pp. 196—198 
451. A Second Memoir on Quartic Surfaces ..... 
Proc. Lond. Math. Society, t. in. (1869—1871), pp. 198—202 
452. On an Analyticcd Theorem from a neiv point of view 
Proc. Lond. Math. Society, t. in. (1869—1871), pp. 220, 221 
453. On a Problem in the Calculus of Variations .... 
Proc. Lond. Math. Society, t. hi. (1869—1871), pp. 221, 222 
454. A Third Memoir on Quartic Surfaces ..... 
Proc. Lond. Math. Society, t. hi. (1869—1871), pp. 234—266 
455. On Pinchers Models of certain Quartic Surfaces 
Proc. Lond. Math. Society, t. in. (1869—1871), pp. 281—285 
456. Note on the Discriminant of a Binary Quartic 
Quart. Math. Journ. t. x. (1870), p. 23 
457. On the Quartic Surfaces (#]£ U, V, IF)' 2 = 0 
Quart. Math. Journ. t. x. (1870), pp. 24—34 
458. On the Anharmonic-Ratio Sextic ...... 
Quart. Math. Journ. t. x. (1870), pp. 56, 57 
459. On the Double-Sixers of a Cubic Surface .... 
Quart. Math. Journ. t. x. (1870), pp. 58—71 
460. Note on Mr Frost’s paper On the direction of the Lines of 
Curvature in the neighbourhood of an Umbilicus 
Quart. Math. Journ. t. x. (1870), pp. Ill—113 
461. On the Geometrical Interpretation of the Covariants of a Binary 
Cubic ........... 
Quart. Math. Journ. t. x. (1870), pp. 148, 149 
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