ROY] 



794. 



[ROY 



Royer, Ernest. 11. Pouvoir hydrogenant du 

 courant intrapilaire ; transformation de 1'acide 

 oxalique et de 1'acide carbonique en acide 

 formique. Bordeaux, Mem. Soc. Sci. VIII., 

 1870, pp. 85-96 ; Paris, Acad. Sci. Compt. Kend. 

 LXX., 1870, pp. 731-732. 



12. [Sur 1'electrolyse des acides organiques.] 



Bordeaux, Mem. Soc. Sci. VIII., 1870, pp. v- 

 vii, xix xx, xxxi-xxxii, xxxv-xxxviii. 



13. Experience sur le courant intrapilaire 



de la pile de GROVE. Paris, A cad. Sci. Compt. 

 Rend. LXX., 1870, pp. 158-159. 



Roys, (le Marquis) J. de. 13. Sur 1'argile plas- 

 tique considered comme assise geologique. Paris, 

 Bull. Soc. Geol. XXIIL, 1866, pp. 183-190. 



14. Sur les terrains tertiaires des environs 



de MoDtfort-rAmamy (Seine-et-Oise). [1866.] 

 Paris, Bull. Soc. Geol. XXIV., 1867, pp. 111- 

 114, 735-736. 



15. Sur le diluvium gris. Paris, Bull. Soc. 



Geol. XXIV., 1867, pp. 841-842. 



16. Note sur les formations d'eau douce 



superieures aux sables de Fontainebleau. [1868.] 

 Paris, Bull. Soc. Geol. XXVI., 1869, pp. 376- 

 380. 



17. Note sur la presence d'ossements de 



cetaces dans le diluvium de la Seine. Paris, 

 Bull. Soc. Geol. XXVIII., 1871, pp. 33-35. 



Royston-Pigott, G. West. On high-power de- 

 finition. Monthly Microsc. Journ. II., 1869, 

 pp. 295-305 ; III., 1870, pp. 192-194. 



~ 2. The markings on the Podura scale. 

 Monthly Microsc. Journ. III., 1870, pp. 13-14. 



3. On a new critical standard measure of 



the perfection of high -power definitions as 

 afforded by diatoms and Nobert's lines. 

 Monthly Miscrosc. Journ. III., 1870, pp. 305- 

 315. 



4. On the optical advantages of immersion 



lenses and the use of deviation- tables for optical 

 research. Monthly Miscrosc. Journ. IV., 1870, 

 pp. 20-26, 134-143. 



5. On the advancing aplanatic power of the 



microscope, and new double-star and image 

 tests. Monthly Microsc. Journ. IV., 1870, pp. 

 254-268. 



6. On aplanatic definition and illumination 

 with optical illustrations. Monthly Microsc. 

 Journ. IV., 1870, pp. 296-307. 



7. On a searcher for aplanatic images 



applied to microscopes, and its effects in 

 increasing power and improving definition. 

 Phil. Trans. CLX., 1870, pp. 591-604 ; Roy. Soc. 

 Proc. XVIII., 1870, pp. 327-330 ; Ann. Mag. 

 Nat, Hist. VI., 1870, pp. 257-260; Monthly 

 Microsc. Journ. V., 1871, pp. 129-132. 



8. On certain imperfections and tests of 



object-glasses. Quarterly Journ. Microsc. Sci. 

 X., 1870, pp. 10-17. 



Royston-Figott, G. West. 9. High-power de- 

 finition and its difficulties, and the visibility of 

 diatomaceous beading. Quarterly Journ. Mi- 

 crosc. Sci. X., 1870, pp. 168-179. 



10. On an Aplanatic Searcher, and its 



effects in improving high-power definition in the 

 Microscope. Quarterly Journ. Microsc. Sci. X., 



1870, pp. 393-396. 



11. On the history, refractions, definition, 



and powers of Immersion Lenses and new Re- 

 fractometers. Monthly Microsc. Journ. V., 



1871, pp. 65-79. 



12. On a useful form of Dynameter 



Micrometer : the Kratometer. Monthly Microsc. 

 Journ. V., 1871, pp. 79-80. 



13. Striking velocity of cannon-balls. Po- 

 pular Sci. Review, X., 1871, pp. 1-13. 



14. Researches on the errors of 



micro- 

 scopical vision, and on new methods of correcting 

 them. Quarterly Journ. Microsc. Sci. XI., 

 1871, pp. 1-17.' 



15. The advancing powers of microscopic 



definition. Monthly Microsc. Journ. VII., 1872, 

 pp. 59-68, 101-104. 



16. On positive and negative aberration. 

 Monthly Microsc. Journ. VII., 1872, pp. 136-137. 



17. On the various phenomena exhibited by 



the Podura test under ordinary and extraordinary 

 microscopic resolving powers. Monthly Microsc. 

 Journ. VII., 1872, pp. 170-176. 



18. On a method of ascertaining magnify- 

 ing power and minute magnitudes by miniatures. 

 Monthly Microsc. Journ. VIII., 1872, pp. 266- 

 269. 



19. On a method of estimating the optical 



and actual thickness of microscopic covering 

 glass. Monthly Microsc. Journ. VIII., 1872, 

 pp. 269-271. 



2O. Note on immersion object-glasses for 

 the microscope. Quarterly Journ. Microsc. Sci. 

 XII., 1872, pp. 111-114. 



21. On the present condition of English 



object-glasses as regards defining power. 

 Quarterly Journ. Microsc. Sci. XII., 1872, pp. 

 260-268. 



22. On the differences between the nominal 



and solar focal length of English object-glasses. 

 Quarterly Journ. Microsc. Sci. XII., 1872, pp. 

 268-272. 



23. On a method of finding the refractive 



index of glass by means of the microscope and 

 white light. Quarterly Journ. Microsc. Sci. 

 XII., 1872, pp. 273-275. 



24. On an aerial stage micrometer : an 



improved form of engraved "lens-micrometer" 

 for Huyghenian eye-pieces, and on finding micro- 

 metrically the focal length of eye-pieces and ob- 

 jectives. [1872.] Monthly Microsc. Journ. IX., 

 1873, pp. 2-5, 51-53. 



