64 THE MICROSCOPE AND CELL-STRUCTURE. 



(16) Reagents : (a) glycerine diluted with an equal volume of 

 water ; (b) a 2% solution of caustic potash in water ; (c) iodine 

 tincture diluted with three times its volume of water ; (d) aniline 

 chloride solution; (e) a 5% solution of common salt; (/) Schulze's 

 solution solution (chlor-zinc-iodine). 



(17) Two wash-bottles (Fig. 11), one for alcohol (methylated spirit, 

 diluted with its own volume of water), the other for water. 



(18) Elder-pith for section-cutting (about 9d. per bundle). 



r\ 



U 

 c 



F G H I 



Fig. 33. Accessories for Microscopic Work. 



A, B, Forceps; C, Scalpel; D, Mounted Needle; K, Needle-holder, into which fresh 

 needles can be fixed ; F, Hpirit-lamp ; G, Canada-balsam Bottle ; H, Reagent- 

 bottle with Dropping-rod ; I, J, Glass Ring and Slide fitted with same, for cover- 

 glass hanging-drop preparations. 



97. Cells in Apple Pulp. Cut a "mealy" apple in 

 halves, remove a small bit of pulp near the core, place it in 

 a small drop of water on a clean slide, tease it out gently 

 with two needles. Carefully lower a clean and dry cover- 

 glass over the drop, so that one edge is first wetted and no 

 air-bubbles get in ; hold the cover with dry forceps or sup- 

 part it with a needle and gently lower it. If air-bubbles 



