﻿Barber: The Pipette Method.] 



[Phil. Journ. Sci., IX, B. No. 4. 



.^-^^A^' 





/• . 



i:y---'r-V'--r. 



•■"•■■•.\ 



.'*»■■ .\ 





Fig. 1. 



■-•,.-- v:-i .■■'■-■ J 



• • . • - ■ • - ':•■-..• y 



.• .•>^" 



Fig. 2. 



Fig. 3. 



Fig. 4. 



Fig. 5. 



Fig. 6. 



Fig. 7. 



Fig. 1. Spores of Aspergillus, freshly isolated and unstained. Fig. 2. Spore of Bacillus subtilis, 

 freshly isolated and unstained. Figs. 3-7. Bacterium coli commune. 



PLATE I. 



