In order that this stage may also be available for hanging-drop observations, 

 we supply the same, if so ordered, with three concavities, ground out of the upper 

 glass surface, upon which the cover-glasses are placed. 



Price : Code-word : 



No. 213: Heating stage ^^nth smooth surface . Mk. 9. . Perineo. 



214: j concavities 15. . Periodo. 



,, 215: Thermo- regulator for any of above heating appliances . w. . Periplo. 



ZOTH'S Cooling Trough, which is more especially designed for purposes 

 of micro-projection, may also be fitted with a thermometer and will in this form 

 be found to serve as a useful heating' stage. (See our Catalogue of Photo- 

 micrographic and Projection Apparatus.) 



No. 216: ZOTH's Cooling Trough, with thermometer Price: Mk. 18. . 



G >de - word : Peritoneo. 



Other Accessory Appliances, 



MALTWOOD'S Finder, No. 217. This simple contrivance for refinding certain 

 points of an object consists principally of a grating of separately numbered 

 small squares photographed upon glass. (See "Zeitschr. f. wiss. Mikrosk.", vol. 

 V, 1888, p. 40.) 



Price: Code -word: 



No. 217: MALTWOOD's Finder incl. case Mk. 20. . Perlado. 



BORN and PETER'S Orientation -plate, No. 218, constructed by us at 

 the suggestion of the gentlemen after whom it is named, serves to mark the 

 position of objects contained in hardening paraffin and at the same time to 

 impress so-called lines of direction upon the paraffin blocks. For the latter 

 purpose one side of the plate has several parallel grooves, of equal width and 

 with sharp edges, cut into it. 



See "Zeitschr. f. wiss. Mikrosk.", vol. XV, 1898, pp. 3149. 

 We generally supply a pair of glass set-squares together with the instrument. 



Price : Code-word : 

 No. 218 : BORN and PETER' s Orientation-plate, ivith pair of glass 



set-squares Mk. 40.-. Perlongar. 



219: Pair of glass set-squares separately w.- -. Permeable. 



Turn-Table (Tournette), No. 220, on wood base, for ringing specimens. 

 Price: Mk. n. . Code-word: Permitir. 



With regard to the different sizes and prices of slides and 

 cover-glasses refer to p. 140 142. 



