68 HOW TO USE THE MICROSCOPE 



disc of metal controlled by a milled head beneath. 

 The glass slip is held in position on the table by 

 a pair of spring clips. Cost of turntable is about 6s. 



4. Two or three small camel-hair or sable pencils. 

 Sables are certainly the best. 



5. A pair of forceps (see p. 9). 



6. A bottle of best gold-size, 6d. or Is. 



7. A bottle of Club Black enamel, 6d. Or 

 ordinary Brunswick black wiU serve. 



8. A glass spirit-lamp as used in chemical 

 laboratories. 



These requisites, and all others that are likely to 



Fig. 23. — Turntable. 



be needed in mounting, are obtainable from dealers 

 in microscopic sundries. 



The worker should first practise cell-making. In 

 this operation a clean glass slip is centred on the 

 turntable, and a thin ring of gold-size is made on 

 the sHp. To make this, a small qi^antity of gold- 

 size of the right consistency is taken on the tip of 

 a sable pencil and run on to the slip as it is rotated 

 on the turntable. The ring must be even, of regular 

 width and thickness, and its diameter must admit 

 of the cover-glass, which is to be used, so covering 



