A SIMPLE AND EFFICIENT DEVICE FOR BOTTLES
CLEANING DROPPING
SAMUEL YI-WEN SHEN Rutgers University, Newark, New Jersey
IRONSTAND DROPPING B O T T L E
THE accompanying figure shows a setup which has been used successfully by students in the qualitative analysis laboratory for the cleaning of dropping bottles. Water added to large bottle A builds up a pressure which can force a stream of soapy water through a jet into the inverted dirty dropping bottle. The stopcock regulates the flow. A bottle can be washed in one minute more satisfactorily than by use of a semimicro brush which cannot reach the corners. A quantity of 250 m!. of soap solution is sufficient for cleaning 3040 bottles. Other cleaning solutions, such as 6 N acetic acid for removing alkali residues, can be handled with equal ease.
VOLUME 34, NO. 7, JULY, 1957
