2030
JOURNAL OF CHEMICAL EDUCATION
OCTOBER,1931
ON THE USE OF EMPTY CHEMICAL BOTTLES Large empty glass bottles in which chemicals were purchased have been found very convenient and economical for use in certain lecture experiments in which the apparatus is quite likely to be broken. As is generally known, experiments demonstrating the properties of oxygen, or other gases collected over water, almost surely result in the cracking of a t least one cylinder. For instance, when burning iron wire in oxygen, one can hardly avoid cracking the apparatus, which is usually a cylinder of small diameter. However, if a glass bottle of a liter and a half or two liters capacity is substituted for the demonstration cylinder in the above experiment the larger volume of oxygen makes success more certain, the experiment more convincing, and the breakage of the container of little consequence.
