[Skip to Content]
[Skip to Content Landing]
September 6, 1913


JAMA. 1913;61(10):769. doi:10.1001/jama.1913.04350100047017

This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.


In the laboratory it is often desirable to have at hand some sort of suction pipet for removing sediments from the bottom of centrifuge-tubes, conical glasses, etc. Those pipets which are made by fitting a rubber bulb over the end of a piece of glass tubing are usually not very satisfactory and if lost or destroyed are not quickly replaced. A medicine-dropper is always at hand or easily obtained, and would make an ideal pipet if only the glass tube were long enough to reach the bottom of the ordinary centrifuge-tube. It can, however, be easily lengthened by drawing it out in the flame to any desired length, as seen in the illustration. This will make a most serviceable pipet which is cheap and which if broken can be readily replaced.

Comment.  —The ordinary medicine-dropper is rather short for making such a pipet. As long a one as possible should

First Page Preview View Large
First page PDF preview
First page PDF preview