XVlll INTRODUCTION. 



LIST OF APPARATUS, ETC. TO BE PROCURED BY TEACHERS FOR 

 THE PURPOSE OF EXHIBITING TO THEIR PUPILS THE EXPERI- 

 MENTS DESCRIBED IN THE LESSONS. 



1 . Two small retorts, or, instead of them, the flasks in wliich Florence 



oil is usually sold; these flasks may be purchased from the grocer, 

 and, when fitted with good corks and bent glass or tin tubes, form 

 excellent vessels for preparing gases. 



2. A small spirit lamp for heating retorts, &c.; or, when it cannot 



conveniently be procured, a lamp sufficient for the purpose may 

 be constructed by using a small bottle, such as an ink-bottle fitted 

 with a cork, through which a piece of tin or glass tube is passed for 

 holding the wick: cotton wick may be procured from the chandlers. 



3. A stock of glass tubes, each about the thickness of a large quill, for 



bending over the spirit lamp, to form tubes for conducting gases, 

 &c. may be purchased at the glass-house. 



4. A holder for supporting retorts, &c. over the flame of the spirit 



lamp, may be formed from a piece of stout iron wire and a 

 wooden stand, as represented in Fig. 1, or purchased, 

 o. Red and blue litmus papers, for testing acids and alkalies, may be 

 purchased from a druggist. 



6. Two slips of platinum foil, or, instead of them, slips of thin window 



glass. 



7. Half-a-dozen glass rods, or, instead of them, narrow slips of window 



glass, "v\nll be required for stirring liqiuds, &c. 



8. An apparatus for burning hydrogen gas may be formed from a 



piece of tobacco pipe passed through a cork, carefully fitted to 

 a four-ounce vial. 



9. Half a dozen test tubes of thin glass, or instead of them ale-glasses, 



for testing liquids. 



10. A glass or porcelain funnel, and some sheets of white filtering paper. 



11. A small porcelain mortar and pestle. 



12. Apothecaries' scales and weights, w^hich cost about 4s. 6d. 



13. Half-a-dozen small vials with glass stoppers, containing 2 oz. sul- 



phuric acid, 2 oz. muriatic acid, 1 oz. phosphorus, ^ oz. caustic 

 potash, ^ oz. tincture of iodine, 4 oz. spirits of wine. 



14. Half-a-dozen wide-mouth bottles with corks, containing 2 oz. black 



oxide of manganese, for the preparation of oxygen gas; 4 oz. 



chlorate of potash, 2 oz. carbonate of soda, 4 oz. metallic zinc in 



fine cuttings, 4 oz. charcoal in small pieces, 4 oz. carbonate of 



ammonia. 

 The above are all that are absolutely necessary. The list, however, 

 may be extended at the pleasure of the teacher, and include specimens 

 of the salts and artificial manures described in the lessons. The 

 pupil may also be encouraged to collect specimens of the rocks to be 

 found in the district in which, the school is situated, which will form 

 a most useful foundation for a school museum. A coloured geological 

 map of the country should also have a place in every agricultural 

 school. 



