42 



A MANUAL OF BACTERIOLOGY 



are first carefully washed with soap and water, 

 then with a boiling solution of potassium per- 

 manganate, to which a few crystals of oxalic acid 

 are added. They are then rinsed with distilled 

 water, and are allowed to drain on a rack for some 

 time, after which they are carefully plugged with 



FIG. 17. CULTIVATION TUBES, FLASKS, ETC. 



A, Gayou's Tube. B, Gayon and Dupetit's Tube. C, Chamber-land's Tube. 

 D, Sternberg's Bulb. E, Aitken's Tubes. F, Pasteur's Flask with Cap. 

 G, Pasteur's Bulb Pipette. H, Pasteur's Test-tube. I, Miquel's Double 

 Tube. J, Lipez's Tube. K, Miquel's Bulb Tube. L, Pasteur's Pipette 

 Flask. MO, Pasteur's Flasks. N, Lister's Flask. P. Chamber-land's Pipette. 

 R, Duclaux's Tube. S, Miquel's Filter Flask. T, Pasteur's Double Tube. 



cotton-wool, care being taken that the wadding 

 inside the neck is perfectly smooth and firm, the 

 tuft outside being large enough to overlap well 

 the lip of the test-tube (Woodhead). They are 



