2. Ferrum redactum, reduced iron, a powder containing at least 75% of metallic iron and a variable amount of oxide. A preparation of it is Trochiscus ferri redacti (strength, 1 grain of reduced iron in each).
3. Ferri sulphas, ferrous sulphate, from which is prepared Mistura ferri composita, “Griffiths’ mixture,” containing ferrous sulphate 25 gr., potassium carbonate 30 gr., myrrh 60 gr., sugar 60 gr., spirit of nutmeg 50 m., rose water 10 fl. oz.
4. Ferri sulphas exsiccatus, which has two subpreparations: (a) Pilula ferri, “Blaud’s pill” (exsiccated ferrous sulphate 150, exsiccated sodium carbonate 95, gum acacia 50, tragacanth 15, glycerin 10, syrup 150, water 20, each to contain about 1 grain of ferrous carbonate); (b) Pilula aloes et ferri (Barbadoes aloes 2, exsiccated ferrous sulphate 1, compound powder of cinnamon 3, syrup of glucose 3).
5. Ferri carbonas saccharatus, saccharated iron carbonate. The carbonate forms about one-third and is mixed with sugar into a greyish powder.
6. Ferri arsenas, iron arsenate, ferrous and ferric arsenates with some iron oxides, a greenish powder.
7. Ferri phosphas, a slate-blue powder of ferrous and ferric phosphates with some oxide. Its preparations are: (a) Syrupus ferri phosphatis (strength, 1 gr. of ferrous phosphate in each fluid drachm); (b) Syrupus ferri phosphatis cum quinina et strychnina, “Easton’s syrup” (iron wire 75 grs., concentrated phosphoric acid 10 fl. dr., powdered strychnine 5 gr., quinine sulphate 130 gr., syrup 14 fl. oz., water to make 20 fl. oz.), in which each fluid drachm represents 1 gr. of ferrous phosphate, 4⁄5 gr. of quinine sulphate, and 1⁄32 gr. of strychnine.
8. Syrupus ferri iodidi, iron wire, iodine, water and syrup (strength, 5.5 gr. of ferrous iodide in one fl. dr.).
9. Liquor ferri perchloridi fortis, strong solution of ferric chloride (strength, 22.5% of iron); its preparations only are prescribed, viz. Liquor ferri perchloridi and Tinctura ferri perchloridi.
10. Liquor ferri persulphatis, solution of ferric sulphate.
11. Liquor ferri pernitratus, solution of ferric nitrate (strength, 3.3% of iron).