40 
Contents of Volume VIII. 
PAGE 
498. On the inversion of a quadric surface . . . . . 67 
Quart. Math. Journ. t. xi. (1871), pp. 283—288 
499. On the theory of the curve and torse . . . . . 72 
Quart. Math. Journ. t. xi. (1871), pp. 294—317 
500. On a theorem relating to eight points on a conic ... 92 
Quart. Math. Journ. t. xi. (1871), pp. 344—346 
501. Revieiv. Pineto’s tables of logarithms . . . . . 95 
Quart. Math. Journ. t. xi. (1871), pp. 375, 376 
502. On the surfaces divisible into squares by their curves of curva 
ture ........... 97 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 8, 9 
503. On the surfaces each the locus of the vertex of a cone which 
passes through m given points and touches 6— m given lines 99 
Proc. Loncl. Math. Society, t. iv. (1871—1873), pp. 11—47 
504. On the mechanical description of certain sextic curves . . 138 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 105—111 
505. On the surfaces divisible into squares by their curves of 
curvature .......... 145 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 120, 121 
506. On the mechanical description of a cubic curve . . . 147 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 175—178 
507. On the mechanical description of certain quartic curves by 
a modifed oval chuck . . . . . . . . 151 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 186—190 
508. On geodesic lines, in particular those of a quadric surface . 156 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 191—211 
509. Plan of a curve-tracing apparatus . . . . . . 179 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 345—347 
510. On bicursal curves . . . . . . . . . 181 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 347—352 
511. Addition to the memoir on geodesic lines, in particular those 
of a quadric surface . . . . . . . . 188 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 368—380 
512. On a correspondence of points in relation to two tetrahedra . 200 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 396—404 
513. On a bicyclic chuck . . . . . . . . . 209 
Phil. Mag. t. xliii. (1872), pp. 365—367