64 THE CULTIVATION OF BACTERIA. 



FIG. 17. 



Glass benches for supporting plates. 



8. Graduated measuring cylinders of 100 and 1000 c.c. 

 capacity (Fig. 18). 



9. Graduated pipettes of 1 c.c. capacity divided into tenths, 

 and 10 c.c. divided into c.c. (Fig. 19). 



FIG. 18. 



FIG. 19. 



FIG. 20. 



FIG. 21. 



Measuring cylinder. Graduated pipette. Sternberg bulb. 



10. Sternberg bulbs (Fig. 20). 



11. Bulb-pipettes (Fig. 21). 



12. Petri's double dishes (Fig. .22). 



FIG. 22. 



Bulb-pipette. 



Petri's double dish, now generally used instead of plates. (Abbott.) 



