66 



Royston-PigOtt, Dr., M.A., F.R.S. Researches in Circu- 

 lar Solar Spectra, applied to test Residuary Aberration 

 in Microscopes and Telescopes, and the construction of 

 a Compensating Eye-Piece, being a sequel to the paper 

 on a Searcher for Aplanatic Images. 5 plates. Proc. 

 Roy. boc., Vol. XXL, No. 146, p. 426. 8vo. 



London, 1873. 



2. On the use of Black-Shadow Markings and on a Black- 

 Shadow Illuminator. Month. Mic. Journ., Vol. XL, 

 No. 66, p. 245. 8vo. London, 1874. 



3. Appendix to the paper on the Identical Characters of Spher- 



- ical and Chromatic Aberration. Month. Mic. Journ., 



No. LXXXIV., Dec. i, 1875. 8vo. London, 1875. 



4. On the Characters of Spherical and Chromatic Aberration 

 arising from Excentrical Refraction, and their Relations 

 to Chromatic Dispersion. Month. Mic. Journ., No. 

 LXXXVIL, p. 128. 8vo. London, 1876. 



5. The Villi and Beading Discovered in Butterfly and Moth 

 Scales, from Journ. Microscopy and Nat. Set., Vol. I., 

 N.S., p. 167. 8vo. London and Bath, 1888. 



6. Microscopical Imagery, i plate. Journ. Microscopy and Nat. 

 Sci., Vol. II.,N.s., p. 14. 8vo. London and Bath, 1888. 



Rutley, Frank, F.G.S. Notes on some peculiarities in the 

 microscopic structure of Felspars. 2 plates. Quart. 

 Journ. Geol. Soc., Aug., 1875, p. 479. 8vo. 



London, 1875. 



2. The Study of Rocks, an Elementary Text-Book of Petrology. 

 6 plates, 88 woodcuts. 8vo. London, 1881. 



Ryder, John A. On the Preservation of Embryonic Materials 

 and Small Organisms, together with Hints upon Embed- 

 ding and Mounting Sections serially. Report oj Com. 

 of Fish and Fisheries of U.S., p. 607. 8vo. N.D. 



