170 BIBLIOGRAPHY OF INVERTEBRATA, CRYPTOGAMIA, ETC. 



Mayall, J., jun. — Aperture Measurements of Immersion Objectives ex- 

 pressed as " Numerical Aperture." Journ. R. Micr. Soc, II., pp. 842-3. 

 „ „ See Edmunds, J. 

 Merriman, 0. 0. — The Preparation and Mounting of Double Stainings. 



Am. Journ. Micr., IV., pp. 157-9. 



Micrometric Unit, A. „ „ pp. 172-3. 



Microscopical Laboratory. [Dr. C. Seiler's.] Am. Nat., XIII., p. 796. 



Ord, W. M. -On the Influence of Colloids upon Crystalline Form and 



Cohesion. 179 pp. 8 plates and 25 figs. (8vo. London, 1879.) 



" Quidam." — What is the use of the Microscope in Medicine ? [From ' Bull. 

 Sci. Depart. Nord.'] Jouim. de Micr., III., pp. 327-31. 



KiCHARDSON, T. — Live-box and Compressorium. 1 fig. 



Sci.-Gosslp, 1880, p. 16. 

 Rogers, W. A. — On the First Eesults from a new Diffraction Ruling Enj;lne. 



Am. Journ. Set., XIX., pp. 54-9. 

 RoLFE, C. S. — On some Improvements in Microscopical Turntables. Plate 14. 



Journ. Quek. Micr. Club, V., 248-9. 



S., 0. W. — Simple Compressorium. 3 figs. Am. Journ. Micr., IV., pp. 165-6. 



ScHULTZE, A. — Au Easy and Simple Method of Resolving the Finest-lined 



Dry Diatomaceous Tests mounted on Cover with special reference to Amphijjlcwa 



pellucida. Journ. Quek. Micr. Club, V., pp. 209-12. 



Seiler, C. — Photography as an aid to Microscopical Investigations. 



A)n.. Journ. Micr., IV., pp. 159-62. 

 Smith, H. L. — Measuring Aperture: a word for Mr. John Mayall, jun., and 

 Prof. R. Hitchcock. Am. Journ. Micr., IV., p. 177. 



Smith, S. L. — See Edmunds, J. 



Spengel, J. W. — Some new Improvements in the Slide (Rivet-Leiser) Micro- 

 tome. 4 figs. Zool. Anzeig., II., pp. 641-8. 

 Stephenson, J. W. — On a Table of Numerical Apertures, showing the Equi- 

 valent Angles of Aperture of Dry, Water-Immersion, and Homogeneous-Immer- 

 sion Objectives with their respective Resolving Powers, &c. 



Journ. 2i. Micr. Soc, II., pp. 839-41. 

 Strasburger, E. — On an Object suitable for the demonstration of Cell-division. 

 12 pp. [Sep. reprint] SB. Jen. Gcscll. Med. ^ Naturwiss., 1879. 



(Ward, R. H.) — Improvements in Cell-cutting. 5 figs. 



Am. Nat., XIV., pp. 65-7. 

 Wenham, F. H. — See Edmunds, J. 



„ „ On Dark Field Illumination for the Microscope by means of 



the Parabolic Condenser. \_Eniil. Mechanic. XXX., p. 419.] 



„ „ On an improved Microscope Illuminator for Diatoms and 



other Test Objects. 4 figs. E7i;il. Mechanic, XXX.. p. 279. 



Wickersheim's Preserving Method. Zool. Anzeig., II., pp. 669-70. 



Willis, L. M. — In re Apertometers. Am. Journ. Micr., IV., pp. 155-7. 



