VEGETABLE HISTOLOGY. 



other, for making thin "sections" or slices of bodies; also a 

 hone and a strop. 



3. A graduated ruler, having both English and metric scale. 



Dissecting needles. 



Sharp-pointed scissors preferably bent. 



Delicate forceps or pincettes. 



Watch glasses for holding sections. 



Small porcelain evaporating dish. 



Camel's hair brushes, assorted sizes. 



Glass section slides, 3"xl", not too thick, ground edges. 



Cover glasses, %" circles No. 2. 



Camera lucida for drawing. 



Polariscope. , 



Draughtsman's dividers, for drawing. 



Microtome, for section cutting. 



4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 

 17. 



ratus m 

 & Lomb 

 iladelphia. C 



paper. 



be obtained from any large 

 tical Co., Rochester, N. Y. ; 

 of apparatus may be seen in 

 Microscopy, as Behrens' Bo- 



ABLE HISTOLOGY 



CHAPTER II. 



ler to acquire some familiarity with the manipulation 

 of the microscope before studying vegetable objects, it is well 

 to study some simple things like cotton, silk, wool and linen 

 fibres, and these are chosen because they sometimes occur acci- 

 dentally on the slide when we are studying other things, and 

 also because of their great practical importance. 



LINEN, COTTON, SILK, WOOL. 



LINEN. Scrape a linen thread on a glass slide with a knife 

 blade to a woolly mass, mount a little of this on a slide in a 

 drop of water, taking care that the fibres are wetted and no air 

 adheres to them, then cover with a cover glass as described 

 above. The student should guard against an error that begin- 

 ners are apt to fall into, namely, putting too much material on 

 the slide. A very small quantity will suffice. Examine with 

 low power ( 2 / s " objective and 2" eye-piece). Very little will 

 be made out. Some clear, smooth, tangled threads will be seen. 



