xlviii 
CONTENTS. 
496. Tables of the binary cubic forms for the negative deter 
minants = 0 (mod. 4) from —4 to —400; and = 1 (mod. 4) from 
— 3 to — 99 ; and for five irregular negative determinants . 
Quart. Math. Jour. t. xi. (1871), pp. 246—261 
497. Note on the calcidus of logic ....... 
Quart. Math. Jour. t. xi. (1871), pp. 282, 283 
498. On the inversion of a quadric surface ..... 
Quart. Math. Jour. t. xi. (1871), pp. 283—288 
499. On the theory of the curve and torse ..... 
Quart. Math. Jour. t. xi. (1871), pp. 294—317 
500. On a theorem relating to eight points on a conic 
Quart. Math. Jour. t. xi. (1871), pp. 344—346 
501. Review. Pmeto’s tables of logarithms ..... 
Quart. Math. Jour. t. xi. (1871), pp. 375, 376 
502. On the surfaces divisible into squares by their curves of curva 
ture ........... 
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 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 11—47 
504. On the mechanical description of certain sextic curves . 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 105—111 
505. On the surfaces divisible into squares by their curves of 
curvature .......... 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 120, 121 
506. On the mechanical description of a cubic curve 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 175—178 
507. On the mechanical description of certain quartic curves by 
a modified oval chuck ........ 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 186—190 
508. On geodesic lines, in particular those of a quadric surface 
Proc. Lond. Math. Society, t. iv. (1871—1873), pp. 191-211 
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