Hahnemann's Materia Medica Pura ; Chronic Diseases ; British Journal of Homoeopathy , Vols. III and IV. What preparation of Arsenic do we use ? It is the Arsenious acid , from which we make triturations. How is our tincture made ? One part of the pure vitreous acid, finely powdered, is boiled to a complete solution in 60 parts of distilled water and filtered. The filtrate is increased to 90 parts by the addition of distilled water and then 10 parts of 95 per cent. alcohol are added. Drug power, 1/100. What is Fowler's solution ? It is made by dissolving equal parts of Arsenious acid and Carbonate of Potash in boiling distilled water, with the addition of a little compound spirit of Lavender , to give color and flavor. It contains four grains to the ounce ; the dose is from two to five drops. Another preparations is "Donovan's Solution", which is also called Liquor Arsenii et Hydrargyri Iodidi . What are some of the principal features of Arsenical poisoning ? Intense irritation of mucous membranes, violent burning, vomiting and diarrhoea, with great prostration. The burning extends throughout the alimentary tract ; there is great thirst ; the features are sunken ; the stools are bloody and accompanied with tenesmus. What is an antidote to Arsenic poisoning ? Hydrated Peroxide of Iron , in tablespoonful doses every five or ten minutes ; is the most effective antidote to poisoning by Arsenic . Emetics should also be used. What is the general homoeopathic applicability of Arsenicum ? Destructive inflammations of mucous membranes ; oedematous effusions ; fatty degenerations ; various forms of skin affections ; kidney affections and nervous diseases of various kinds are met by this remedy. Give seven grand characteristics of Arsenicum.