BAL] 



110 



[BAL 



blocks. [1870-71.] Dublin Soc. Journ., 6, 1875, 

 pp. 70-75. 



Ball, Robert Stawett. 27. On energy. [1871.] 

 Dublin Soc. Journ., 6, 1875, pp. 187-189. 

 28. Screw co-ordinates and their applica- 

 tions to problems in the dynamics of a rigid 

 body. [1874.] Irish Acad. Trans., 25, 1875, 

 pp. 295-327. 



29. The theory of screws : a study in the 



dynamics of a rigid body. [1875.] Mathem. 

 Annal., 9, 1876, pp. 541-553. 



30. Observations of the minor planets 

 with the transit-circle at Dublin. 

 Astron. Soc. Month. Not., 37, 1887, pp. 14-15. 



31. Note on a transformation of LAGEANGE'S 



equations of motion in generalised coordinates, 

 which is convenient in physical astronomy. 

 Astron. Soc. Month. Not., 37, 1877, pp. 265- 

 268. 



32. On an elementary proof of "LAGRANGE'S 



equations of motion in generalized co-ordinates." 

 [1876.] Irish Acad. Proc., 2, 1877, pp. 463- 

 464. 



33. On the principal screws of inertia of 



a free or constrained rigid body. Phil. Mag., 

 6, 1878, pp. 274-280. 



34. Notes on non-Euclidian geometry. 

 Brit. Assoc. Rep., 1880, pp. 476-477. 



35. On the annual parallax of the star 

 P in 242. [1880.] Astron. Soc. Month. Not., 

 41, 1881, pp. 36-42. 



36. Further researches on the annual 



parallax of 61 Cygni. Astron. Soc. Month. Not., 

 41, 1881, pp. 162-166. 



37. On a simple approximate method of 

 calculating the effect of refraction upon the 

 distance and position-angle of two adjacent stars. 

 Astron. Soc. Month. Not., 41, 1881, pp. 445- 

 447. 



38. On the elucidation of a question in 



kinematics by the aid of non-Euclidian space. 

 Brit. Assoc. Rep., 1881, pp. 535-536. 



39. Extension of the theory of screws to 



the dynamics of any material system. Irish 

 Acad. Trans., 28, pp. 99-136 (Ft. 7, 1881); 

 Brit. Assoc. Rep., 1881, pp. 547-548. 



4O. Researches on the annual parallax of 



the star Groombridge, 1618. [1880.] Coper- 

 nicus, 1, 1881, pp. 16-22. 



41. The distances of the stars. [1881.] 



Roy. Instit. Proc., 9, 1882, pp. 514-519; Nature, 

 24, 1881, pp. 91-92. 



42. Determination of the annual parallax 

 of 6 Cygni B = 2 2486. Copernicus, 2, 1882, 

 pp. 159-163. 



43. Certain problems in the dynamics of 

 a rigid system moving in elliptic space. [1881.] 

 Irish Acad. Trans., 28, pp. 159-184 (Pt. 9, 

 1882). 



Ball, Robert Stawell. 44. A glimpse through the 

 corridors of time. Origin and development of 

 the Moon from the data of Tidal Evolu- 

 tion. [1881.] Nature, 25, 1882, pp. 79-82, 

 103-107. 



45. On the method of regulating a clock 



intended to show correct mean time. [1877.] 

 Irish Acad. Proc., 3, 1883, pp. 66-68. 



46. Researches on the parallax of 61 (A) 



Cygni, made at Dunsink. [1878.] Irish Acad. 

 Proc., 3, 1883, pp. 209-212. 



47. Note on the application of LAGRANGE'S 



equations of motion to problems in the dynamics 

 of a rigid body. [1879.] Irish Acad. Proc., 

 3, 1883, pp. 213-214. 



48. Observations in search of stars with 



a large annual parallax. [1878.] Irish Acad. 

 Proc., 3, 1883, pp. 215-226. 



49. Speculations on the source of meteor- 



ites. [1879.] Irish Acad. Proc., 3, 1883, pp. 

 227-230; Nature, 19, 1879, pp. 493-495. 

 SO. Researches on annual parallax, made 

 at Dunsink. [1881.] Irish Acad. Proc., 3, 

 1883, pp. 355-367. 



51. Preliminary note on the plane re- 



presentation of certain problems in the dynamics 

 of a rigid body. [1881.] Irish Acad. Proc., 3, 

 1883, pp. 428-434. 



52. On homographic screw systems. 



[1881.] Irish Acad. Proc., 3, 1883, pp. 435-446. 



53. Contributions to the theory of screws. 



[1882.] Irish Acad. Proc., 3, 1883, pp. 661- 

 669. 



54. On the occurrence of great tides since 



the commencement of the geological epoch. 

 [1882.] Nature, 27, 1883, pp. 201-203. 

 Ball, Valentine. 2O. On the occurrence of 

 Tupaia Ellioti, Waterhouse, in the Satpura Hills, 

 Central Provinces. Bengal, Asiat. Soc. Proc., 

 1874, pp. 95-96. 



21. On the discovery of a new locality for 



copper in the Narbada valley. India, Geol. 

 Survey Records, 7, 1874, pp. 62-63. 



22. On the building and ornamental stones 



of India. India, Geol. Survey Records, 7, 1874, 

 pp. 98-122. 



23. Geological notes made on a visit to 



the coal recently discovered in the country of 

 the Luni Pathans, south-east corner of Afghan- 

 istan. India, Geol. Survey Records, 7, 1874, 

 pp. 145-158. 



24. The Rigarh and Hingir coal-field. 



(Second notice.) India, Geol. Survey Records, 

 8, 1875, pp. 102-121. 



25. On an ancient kitchen-midden at 



Chaudwar, near Cuttack. Bengal, Asiat. Soc. 

 Proc., 1876, pp. 120-121. 



26. Remarks on Dr. O. FEISTMANTEL'S 



paper, entitled "giant-kettles" (pot-holes) caused 



