Sublimed sulphur also results from the spontaneous combustion of coal seams containing pyrites.
Useful combinations are: borax 10%, carbolic acid 5%, ichthyol 5%, sublimed sulphur 10%, thymol 22%, &c.
It is obtained as a yellowish coloured mass and can be sublimed in the form of needles which melt at 40° C. It possesses an unpleasant smell and its vapour is extremely poisonous.
Chrysippus determined it, following Zeno, to be fiery breath or ether, a spiritualized sublimed intermediate element.
Morphine, in the pure state, can be sublimed, but codeine and narceine are said not to give a sublimate.
Even if sublimed in smoking opium, morphine would, in M'Callum's opinion, probably be deposited in the pipe before it reached the mouth of the smoker.
Phys., 1900 (7), 21, p. 34) converts the element by dilute nitric acid into selenium dioxide which is then sublimed, and dissolved in water.
But no genuine science of astronomy was founded until the Greeks sublimed experience into theory.
For further purification, it may be sublimed, after having been previously mixed with a little powdered charcoal, or it may be mixed with a small quantity of iodine and heated.
Arsenic pentasulphide,As2S5, can be prepared by fusing the trisulphide with the requisite amount of sulphur; it is a yellow easily-fusible solid, which in absence of air can be sublimed unchanged; it is soluble in solutions of the caustic alkalis, forming thioarsenates, which can also be obtained by the action of alkali polysulphides on orpiment.