A distilling apparatus for experiments in chemistry can easily be
made with flasks and bent glass tubes, fig. 4, or even by means
of pieces of tube alone as in fig. 5, one being bent and the other
straight; the tubes and flasks can be united by means of corks
perforated by a round or keyhole file. Empty oil-flasks serve well
for this purpose, they can readily be cleansed by putting a little
oil of vitriol into them, shaking it well about, and then washing
them out with clean water.