O/. ///] INTERPRETATION OF APPEARANCES 115 



iiber des Herren Robert Brown Entdeckung lebender, selbst im Feuer unzer- 

 storbarer Theilchen in alien Korpern." From "Die Gesellschaft fiir Befor- 

 derung der Xaturwissenchaften zu Frieburg." (1828.) 



For overcoming pedesis for photography see Gage, The use of a solution 

 of gelatin to obviate pedesis in photographing milk globules and other minute 

 objects in water. Transactions Amer. Micr. Soc., Vol. XXIV., 1902, p. 21. 



For figures (photo-micrographs, etc. ) of the various forms of starch, see 

 Bulletin No. 13 of the Chemical Division of the U. S. Department of Agri- 

 culture. For Hair and Wool, see Bulletin of the National Association of Wool 

 Growers, 1875, p. 470, Proc. Amer. Micr. Soc., 1884, pp. 65-68. Herzfeld, 

 translated by Salter. The technical testing of yarns and textile fabrics, Lon- 

 don, 1898. See also the Bibliography at the end for works relating to adulter- 

 ation of foods, etc., for further discussions of the elements used in foods and 

 drugs. 



For different appearances due to the illuminator, see Nelson, in Jour. Roy. 

 Micr. Soc., 1891, pp. 90-105 ; and for the illusory appearances due to diffrac- 

 tion phenomena, see Carpenter-Dallinger, p. 434. Mercer. Trans. Amer. Micr. 

 Soc., pp. 321-396. Also, A. E. Wright's Principles of Microscopy; Conrad" 

 Beck. 



For the Binocular see Carpenter-Dallinger ; Mayall ; Spitta. 



1. Positive ocular. 



2. Draw-tube. 



3. Main tube or body. 



4-5. Society screws in the draw-tube and body. 



6. Objective in position. 



7. Stage. 



8. Spring for holding slides. 



9. Sub-stage condenser. 

 10. Iris diaphragm. 



n. Plane and concave mirror. * 



12. Horse-shoe base. 



13. Rack and pinion for condenser. 



14. Flexible pilar. 



15. vSpiral spring of fine adjustment. 



16. Fine adjustment. 



17. Coarse adjustment. 



THE HICROSCOPE IN SECTION 



