Solids may be directly admitted to the tube from a weighing bottle, while liquids are conveniently introduced by means of small stoppered bottles, or, in the case of exceptionally volatile liquids, by means of a bulb blown on a piece of thin capillary tube, the tube being sealed during the weighing operation, and the capillary broken just before transference to the apparatus.
The prepared leaves have a faint odour and bitter taste; and to preserve their properties they must be kept excluded from light in stoppered bottles.
Ergot should be kept in stoppered bottles in order to preserve it from the attacks of a species of mite, and to prevent the oxidation of its fatty oil.
The substance is weighed into a small stoppered bottle, which is then placed beneath the mouth of the barometer tube.
The pump is then removed and the stoppered bottle can be stored in a fridge.