LABORATORY AND PERMANENT OUTFIT. XXI 



8. Absolute alcohol. For finer histological work abso- 

 lute alcohol and a larger number of grades of commercial 

 alcohol more carefully prepared are necessary. 



9. Iodine solution. Distilled water 10 c.c., potassic 

 iodide 1 gm., iodine 0.25 gm. Dilute to 250 c.c. 



10. Glycerine. Pure glycerine is employed in some 

 cases, but equal parts of glycerine and distilled water will 

 generally be found most serviceable. 



11. Scnulze's solution. This may be prepared accord- 

 ing to the rule given in Strasburger's Praktikum, but it 

 will be found more convenient to employ Griibler's chlor- 

 iodide of zinc, which may be obtained of Eimer and 

 Amend, New York. 



12. Potash solution. One part of solid caustic potash 

 dissolved in 20 parts of distilled water. This reagent 

 attacks glass, and care should be taken to prevent its 

 getting on the objectives. 



13. Glacial acetic acid. 



14. Sulphuric acid. 



15. Hydrochloric acid. 



16. Picric acid. 



17. Phlorog-lucin. One per cent alcoholic or watery 

 solution. Employed with hydrochloric acid as a test 

 for lignin. 



18. Picric aniline blue. Add picric acid to distilled 

 water until a saturated solution is obtained. To this add 

 slowly a saturated watery solution of aniline blue until it 

 is of a deep blue-grSen color. 



