BAL] 



79 



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Ball, Robert Stawell. 3. Ou an optical pheno- 

 menon [mirage]. Phil. Mag. XXXV., 1868, p. 

 404. 



4. On vortex-rings in air. Phil. Mag. 



XXXVI., 1868, pp. 12-14 ; Annales de Cliimie, 

 XV., 1868, p. 507 ; Dublin Soc. Journal, V., 

 18VO, pp. 275-276. 



5. Lecture experiments to illustrate the 

 laws of motion. Phil. Mag. XXXVII., 1869, 

 pp. 332-339. 



6. The small oscillations of a particle and 

 of a rigid body. Brit. Assoc. Rep. XL. IS70 

 (Sect.), pp. 10-12; Quart. Journ. Math. XI., 

 1871, pp. 206-209. 



7. On Nebula. [1869.] Dublin Soc. 

 Journal, V., 1870, pp. 339-347. 



8. Account of experiments upon the me- 



chanical efficiency of different forms of pulley 

 blocks. [1870-71.] Dublin Soc. Journal, VI., 

 1870, pp. 70-75. 



9. Note on an elementary proof of a theorem 

 of LAGRANGK'S. [1869.] Phil. Mag. XXXIX., 

 1870, pp. 107-108. 



10. A problem in mechanics. To determine 

 the small oscillations of a particle on any surface 

 acted upon by any forces. [1869.] Quart. 

 Journ. Math. X., 1870, pp. 220-228. 



11. Exhibition and description of a model 



of a conoidal cubic surface called the "cylin- 

 droid," which is presented in the theory of the 

 geometrical freedom of a rigid body. Brit. 

 Assoc. Rep. XLL, 1871 ( Sect.), pp. 8-9 ; Phil. 

 Mag. XLII., 1871, pp. is 1-133. 



12. Account of experiments upon the re- 

 sistance of air to the motion of vortex-rings. 

 Brit. Assoc. Rep. XLL, 1871, (Sect.), pp. 26-29 ; 

 Phil. Mag. XLII., 1871, pp. 208-210. 



13. On the small oscillations of a rigid body 



about a fixed point under the action of any forces, 

 and more particularly when gravity is the only 

 force acting. Irish Acad. Trans. XXIV., 1871, 

 pp. 593-628 ; Irish Acad. Proc. I., 1873-4, 

 pp. 11-13. 



14. On the orbit of the binary star Ursae 

 Majoris. Astrou. Soc. Month. Not, XXXII., 

 1872, pp. 336-339. 



15. Account of experiments upon the retar- 

 dation experienced by vortex rings of air when 

 moving through air. [1871.] Irish Acad. 

 Trans. XXV., 1872, pp. 135-155 ; Irish Acad. 

 Proc. I., 1873-74, p. 113. 



16. The theory of screws, a geometrical 



study of the kinematics, equilibrium, and small 

 oscillations of a rigid body. [1871.] Irish 

 Acad. Trans. XXV., 1872, pp. 157-215; Quar- 

 terly Journ. Math. XII., 1873, pp. 41-47 ; Irish 

 Acad. Proc. I., 1873-4, pp. 233-238. 



Ball, Robert Stawell. 17. On a geometrical 

 solution of the following problem : A quiescent 

 rigid body possessing three degrees of freedom 

 receives an impulse, determine the instantaneous 

 screw about which the body commences to twist. 

 Brit, Assoc. Rep. XLIII., 1873 (Sect.), pp. 26- 

 27. 



18. Contributions to the theory of screws. 



Brit. A.^soc. Rep. XLIII., 1873 (Sect.), pp. 27- 

 2S. 



19. Researches in the dynamics of a rigid 



body by the aid of the theory of screws. Roy. 

 Soc'. Proc. XXL, 1873, pp. 385-386. 



20. Notes on applied mechanics. 1. Paral- 

 lel motion. 2. The contact of cams. [1871.] 

 Irish Acad. Proc. I., 1873-4, pp. 243-245; 

 Quarterly Journ. Math. XII., 1873, pp. 112- 

 114. 



21. On a new approximation to the orbit 

 of the binary star Ursa? Majoris. [1872.] 

 Irish Acad. Proc. I., 1873-4, pp. 316-328. 



22. Notes on applied mechanics. 3. Of 



the theory of long pillars. 4. Note on a hydro- 

 dynamical theorem due to Professor STOKES. 

 Irish Acad. Proc. I., ] 873-4, pp. 491-493. 



23. Screw co-ordinates and their applica- 

 tions to problems on the dynamics of a rigid 

 body. [1874.] Irish Acad. Proc. I., 1873-4, 

 pp. 552-553. 



Ball, Valentine. Ou the jungle products used 

 as articles of food by the inhabitants of the dis- 

 tricts of Maubhi'uii and Ha/.aribagh. Bengal, 

 Asiat. Soc. Journ. XXXVI. (pt. 2), 1868, "pp. 

 73-82. 



2. Notes on the Kheriahs, an aboriginal 



race living in the hill tracts of Manbhum. 

 Bengal, Asiat, Soc. Proc. 1868, pp. 190-193. 



3. On the flora of Manbhum. Bengal, 



Asiat. Soc. Proc. 1868, pp. 254-255; Bengal, 

 Asiat. Soc. Journ. XXXVIII. (pt. 2), 1869, "pp. 

 112-124. 



4. Notes on a trip to the Nicobar and 

 Andaman Islands. Part 1. The Nicobars. 

 Bengal, Asiat. Soc. Proc. 1869, pp. 250-253. 



5. The Ramgurh coal-field. India, Geol. 

 Survey Mem. VI., 1869, pp. 109-135. 



6. Brief notes on the geology and on the 

 fauna in the neighbourhood of Nancowry Har- 

 bour, Nicobar Islands. [1869.] Bengal, Asiat. 

 Soc. Journ. XXXIX. (pt. 2), 1870, pp. 25-34. 



7. Notes on thegeology of the vicinity of 

 Port Blair. Andaman Islands. Bengal, Asiat. 

 Soc. Journ. XXXIX. (pt. 2), 1870, pp. 231- 

 239. 



8. Notes on birds observed in the neigh- 

 bourhood of Port Blair during August 1869. 

 Bengal, Asiat. Soc. Jouru. XXXIX. (pt. 2), 

 1870, pp. 240-243. 



