494 ArPENDIX. 



1 6. Mayer's Solution. 

 See note, p. 386. 



1 7. Miiller s Fluid. 



Bichromate of potash 25 grammes. 



Sodic sulphate 10 grammes. 



Distilled water i litre. 



1 8. Osmic Acid, Solution of. 



Best bought ready made in the form of i per cent, solu- 

 tion. 



The crystals are supplied in small tubes each containing 

 I gramme. Such a tube should be broken up in 100 c. c. 

 of distilled water, great care being taken to avoid contact 

 with the resulting vapour. 



This reagent should be kept in a blank stoppered 

 bottle, perfectly in the dark. 



19. ParaflSn. 



See Appendix F. 



20. Pasteur's Solution, 



See note, p. 384. The amount of water should be 8376 

 parts. 



21. Picric Acid, Solution of. 



Make a saturated solution in distilled water. 



22. Picric Acid, Kleinenberg s solution of. 



To a cold saturated solution of the acid add 2 parts of 

 nitric or concentrated sulphuric acid. 



Filter, and add to the filtrate three times its bulk of 

 water. 



Immersion of from 3—5 hours will suffice for most 

 preparations. 



23. Potash Solution.* 



Dissolve 5 grammes of polassic hydrate in 100 cubic 

 cent, of water. 



