19 



3. Add a few drops of a 10% solution of magnesium sulphate 



to a few mils of the following solutions : sodium hydro- 

 oxide, sodium carbonate. 



4. Add a few drops of mucilage of acacia to a few mils of 



alcohol. 



5. Add a few drops of a solution of ferric chloride to 5 mils 



of each of the following solutions : sodium carbonate, al- 

 bumen, acacia, sodium salicylate. 



6. Add a few drops of a solution of ferrous sulphate to each of 



the following solutions: sodium hydrate, potassium hy- 

 drate, sodium carbonate, tannic acid, phenol, salicylate of 

 soda, acetate of lead, albumen, potassium oxalate, sodium 

 borate. Allow the last two to stand a few minutes before 

 reading results. 



7. Eepeat the previous experiment using a solution of copper 



sulphate instead of ferrous sulphate. 



8. Add a few drops of lead acetate solution to each of the fol- 



lowing solutions : sodium chloride, albumen, sodium sul- 

 phate, potassium bromide. 



9. Add equal parts of 5% solutions of lead acetate and zinc sul- 



phate. 



10. Add a few drops of a solution of mercuric chloride to each 



of the following solutions : zinc sulphate, quinine sul- 

 phate, albumen, lime water, ferrous sulphate plus heat, 

 potassium iodide, then add excess of potassium iodide. 



11. Recall experiments with tannin and mention incompati- 



bilities. 



12. Add a few drops of tincture of ginger to water, alcohol. 



13. Repeat the above experiment using spirits of camphor in- 



stead of tincture of ginger. 



14. Add a few drops of silver nitrate solution to each of the 

 following : distilled water, tap water, solution of sodium 

 ■chloride, albumen, potassium bromide. ' Allow the tube 

 of distilled water and silver nitrate to stand in daylight 

 for several days. Results. 



