108 KANSAS UNIVERSITY QUARTERLY. 
naturally do in breaking a stick, taking care to have the thumbs 
meet on the circle made by the glass cutter directly opposite the 
deeper cut made by the file. Break off the piece with a strong 
longitudinal as well as lateral pull. The piece of tubing is com- 
pleted for use by turning outward the rim of one end and then heating 
the other end in the flame of*a Bunsen burner sufficiently to melt 
away the rough edge. This is accomplishad in the following man- 
ner: Whittle down one end of an electric Jight carbon so that it 
will fit snugly into the piece of glass tubing, and thus serve as a 
handle while the free end 1s being held in the Bunsen burner flame. 
Whittle down one end of another carbon to a blunt pencil point 
which is to be used in bending outward the rim of the tubing. Now 
hold one end of the piece of tubing in the flame by means of the 
carbon handle and turn it slowly so that the edge may be heated to 
glowing evenly all around. Then press the carbon pencil point 
into the softened end of the tubing, at the same time giving the 
carbon a twist so that the edge may be turned out evenly. It is 
best to turn out the rim only sufficiently to form a shoulder for ty- 
ing on the cloth bottoms, and accordingly only the extreme end of 
the tubing should be held in the flame, and the pressure of the 
carbon point should be moderate. The other end of the tubing is 
next held in the flame and slowly turned until the edge is melted 
smooth, but not to such an extent that the rim begins to draw in- 
ward. The upper half of the tubing may now be ground on an 
emery wheel or grindstone so that it may be written on with a 
lead pencil. Tie a piece of thin muslin with a thread over the bot- 
tom of the tubing and trim the free edge close so that it may as 
little as possible soak up and carry reagents from one receptacle 
to another when the buckets are in use. In 
tying on the cloth have one end of the thread 
extend about 8 cm. from the knot. Makea 
hole with a needle at the center of the cloth 
bottom and pass the thread up through 
this. The buckets are to be suspended in 
the reagent bottles by means of this thread. 
The completed bucket is represented by 
Eng. 32: 
If the material to be fixed contains so much 
air that it will not sink in the fixative, and an 
air pump is not available, the material may 
be made to sink by stringing on the thread a 
porcelain or glass button, or better a solid 
