620 APPENDICES. 



31. Picro-lithium-carmine (Orth). 



To above-mentioned lithium-carmine solution 



add saturated solution of picric acid . . 2'3 



32. Potash solution. 



(a) 1 to 3 per cent. 



(b) 10 



(c) 33 



33. Safranine. 



(a) Concentrated alcoholic solution. 



(b) Watery solution . . . . ; 1 per cent. 



34. Sulphuric acid, pure. 



35. Salt solution . : .'.. ,' . ,' . . 0-8 per cent. 



36. Turpentine. 



37. Vesuvin. 



(a) Concentrated alcoholic solution. 



(b) Watery solution. 



Water, distilled. 



Water, sterilised. 



Distilled water can be kept for use in a wash bottle, or far 

 better in a siphon apparatus. Sterilised water is convenient in 

 plugged sterile test-tubes, which may be kept close at hand in a 

 beaker, or tumbler, with a pad of cotton wool at the bottom. The 

 numbered reagents can be conveniently arranged on shelves within 

 easy reach. Alcoholic solutions of the aniline dyes and other special 

 preparations should be kept in bottles with ground- glass stoppers. 

 Aqueous solutions of the dyes may be kept in bottles with funnel 

 niters, and the solution filtered before use. To both aqueous and 

 alcoholic solutions a few drops of phenol, or a crystal of thymol, 

 should be added as a preservative. For the rapid staining of cover- 

 glass preparations, it is convenient also to have the most frequently 

 used stains (fuchsine, methyl- violet) in bottles provided with pipette 

 stoppers. 



(D) REAGENTS FOR MOUNTING AND PRESERVING PREPARATIONS. 



Acetate of potash. 

 Concentrated solution. 



Asphalte lac. 



