34 
VOLUME Vil. 
PAGE 
417. On the Locus of the Foci of the Conics which pass through 
Four Given Points ........ 1 
Phil. Mag. t. XXXII. (1866), pp. 362—365 
418. A Remark on Differential Equations ..... 5 
Phil. Mag. t. xxxii. (1866), pp. 379—381 
419. A Theorem on Differential Operators ..... 8 
Phil. Mag. t. xxxii. (1866), pp. 461—472 
420. On Riccati’s Equation ........ 9 
Phil. Mag. t. xxxvi. (1868), pp. 348—351 
421. Note on the Solvibility of Equations by means of Radicals . 13 
Phil. Mag. t. xxxvi. (1868), pp. 386, 387 
422. On the Geodesic Lines on an Oblate Spheroid . . . . 15 
Phil. Mag. t. xl. (1870), pp. 329—340 
423. On the Plane Representation of a Solid Figure . . . 26 
Phil. Mag. t. xli. (1871), pp. 286—290 
424. On the Attraction of a Terminated Straight Line . . . 31 
Phil. Mag. t. XLI. (1871), pp. 358—360 
425. Note on the Geodesic Lines on an Ellipsoid . . . . 34 
Phil. Mag. t. xli. (1871), pp. 534, 535 
*426. On a supposed New Integration of Differential Equations of 
the Second Order ......... 36 
Phil. Mag. t. xlii. (1871), pp. 197—199 
427. On Gauss’ Pentagramma Mir if cum . . . . . . 37 
Phil. Mag. t. XLII. (1871), pp. 311, 312 
*428. Note sur la correspondance de deux points sur une courbe . 39 
Comptes Rendus, t. lxii. (1866), pp. 586—590 
*429. Sur les Coniques déterminées par cinq conditions de contact 
avec une courbe donnée . . . . . . . . 40 
Comptes Rendus, t. lxiii. (1866), pp. 9—12