burette

On running the solution from the burette into the assay, do not let it run down the side of the flask.

The accuracy of the reading of a burette is sensibly increased by the use of an Erdmann float.

Then run out cautiously until the level of the liquid in the burette stands at zero.

If the burette is filled from the top, the float rises with aggravating slowness, and this is its chief disadvantage.

A convenient plan for filling a burette from below is shown in fig. 30.