Also Collosols of Iodine and Sulphur, and finally Collosols of Cocain and Quinin. Of all the above, except sulphur, only three small ampules have been submitted. This does not admit of any chemical examination but a statement of the physical appearance may be of interest.
Collosol Arsenicum, 0.2 per cent.: Very turbid with large quantities of a lemon yellow flocculent precipitate. On shaking does not become homogeneous and rapidly separates again.
Collosol Argentum, 1-2000: The liquid has a slight opalescence. There is considerable deposit of a heavy black precipitate. Does not become homogeneous on shaking and the black substance quickly separates again.
Collosol Cuprum, 0.5 per cent.: Dark red somewhat opalescent liquid. No precipitate. May be colloidal.
Collosol Ferrum, 1-2000: Liquid clear. Large quantities of dark brown flocculent precipitate. The precipitate is not distributed evenly when the mixture is shaken and settles out quickly on standing.
Collosol Hydrargyrum, 5 per cent.: Milky liquid. Large quantities of white deposit mixed with considerable black. The deposit mixes fairly well but the greater part settles out after standing an hour or two.
Collosol Manganese, 2.5-1000: Clear reddish-brown liquid without deposit of any kind. Is not opalescent or fluorescent.
Collosol Iodin, 1-500: Very pale straw colored liquid without deposit. Has a slight opalescence.
Collosol Sulphur, 1-100: Liquid is opalescent. There is some deposit of yellow particles. A four ounce bottle was also submitted. The liquid in this bottle is milky with considerable deposit of yellow crystals like ordinary crystalline sulphur.
Collosol Cocain, 1-100: Transparent, colorless liquid with no deposit. Chemical examination showed 0.4 per cent. of what may have been cocain. This residue gave alkaloidal tests.