APPARATUS, MATERIAL, AND REAGENTS. 27 



containing glass plates during their sterilisation 

 in the hot-air steriliser, and for 

 storing them until required for 

 use. 



Glass Plates. Small panes 

 of glass, about six inches by four. 

 Not less than three dozen are re- 

 quired for a dozen damp chambers. 



Glass Benches. These are 

 necessary for arranging the glass 

 plates or slides in tiers in the damp chambers 

 (Fig. 10). Metal shelves may be substituted for 

 them, but the former are to be preferred. They 

 can be easily made, in any number required, by 



FIG. 9. 



Box FOR GLASS 

 PLATES. 



FIGS. 10, n. GLASS BENCHES FOR GLASS PLATES OR SLIDES. 



cementing a little piece ol plate glass at either 

 end of a glass slip (Fig. u). 



Glass Rods. One dozen or more glass rods, 

 twelve to eighteen inches in length. They are 

 employed for smoothly spreading out the liquefied 

 nutrient gelatine or agar-agar on the glass plates, 

 etc. 



Thermometers. Two or three centigrade 

 thermometers. 



