96 



Kiss. II. InU-rnal \"ie\v of Apitaratus 



;i^\\\\\\\\\\\\\^V^VW^vi^ 



KiK. III. Cro.s.s section of tlie iippiuulii.s to sliow the po.silion of tlio pliint iUid its ivlalum to the 

 micmscopo and the glass rod; VC, velvet collar sealing the aperture through which the inicroscope 

 works; I, the iris diaphragm; SC, the glass rod; T, tape covering the glass rod to make U light 

 proof; I', the plant. H(\ the collar which slips over the bottle; K. the bottle containing the saturaleil 

 solution ol bichromate of potassium; VVC, the white cardboard to roHoct light into bottle. 



