MISCELLANEOUS APPARATUS 31 



glass rods best done over a B arisen burner or with the 

 aid of a gas blow-pipe. 



Of instruments, scalpels, scissors, forceps, different kinds 

 of needles, hooks, inoculation needles, and hypodermic 

 syringes, or better still Koch's syringe (fig. 19), are required ; 

 and, in the preparation of nutrient media and their use for 

 cultivation, flasks, test-tubes, dishes, plates, pipettes, blocks 

 or benches of glass, potato-knives, &c., are employed. 



Needle 



Tap 



Rubber ball 



FIG. 19. KOCH'S IXJKCTIXG SYRINGE. 



With the instruments now specified, a laboratory is 

 in a position to begin bacteriological work, and it need 

 only be mentioned that the articles necessary for all 

 scientific work must also be at hand, as, for example, 

 working benches, cupboards for reagents, test-tube stands, 

 corks, meat-presses, scales, different kinds of glass and 

 metal vessels, bibulous paper, &c. 



Centrifugal machine. In order to examine fluids which 

 are poor in corpuscular elements, Stenbeck has introduced 



