ABSTRACT
The authors proceed to describe some of the more popular designs, and their discussions begins with a shorter treatment of some of the less accurate balances and end with a detailed treatment of the important electronic analytical balances, which are very accurate measuring devices. They emphasize the word "accurate" to distinguish it from solution preparation procedures which do not need to be accurate. If a piece of glassware is intended to deliver a specified volume, the calibration must obviously take this small volume into account in the sense that it will not be part of the delivered volume. It should be stressed that with the serological pipet, every last trace of solution capable of being blown out must end up inside the receiving vessel. For pipets and for difficult cleaning problems for other pieces of glassware, special cleaning solutions, which chemically break down greasy films through soaking for a period of time, are used.
