=Ammonium, Nitro-sulphate of.= _Syn._ AMMO′′NIÆ NITRO-SUL′PHAS, L. Dissolve sulphite of ammonium, 1 part; in solution of ammonia, 5 parts; and pass nitric oxide gas through the solution; rapidly wash the crystals that form with solution of ammonia, dry in bibulous paper, without heat, and preserve them in a well-stopped bottle.——_Dose_, 10 to 20 gr.; in typhoid fevers, &c. =Ammonium, Oxalate of.= (NH_{4})_{2}C_{2}O_{4}. _Syn._ AMMO′′NIÆ OX′ALIS, L.; OXALATE D’AMMONIAQUE, Fr. Neutralise a hot solution of oxalic acid with sesquicarbonate of ammonia; evaporate and crystallise. _Prop._ It forms beautiful, colourless, long, rhombic prisms, which effloresce in the air; slightly soluble in cold water; freely soluble in hot water; heated in a retort, it yields ammonia, carbonate of ammonia, cyanogen, and carbonic acid, together with oxamide, which sublimes. _Uses, &c._ In _chemistry_, chiefly as a test for calcium (with which it produces a white precipitate soluble in nitric acid), and to separate lime from magnesium, solutions of the salt of which it does not precipitate. A BINOX′ALATE may also be formed; but it possesses no practical interest. =Ammonium, Phosphate of.= (NH_{4})_{3}PO_{4}. _Syn._ AMMO′′NIÆ PHOS′PHAS, L. _Prep._ Saturate a solution of phosphoric acid with sesquicarbonate of ammonium, in slight excess; gently evaporate and crystallise by refrigeration. Diuretic, discutient, and antilithic.——_Dose_, 3 to 10 gr., or 20 to 30 drops of a saturated solution, 3 or 4 times a day; in gout, rheumatism, and calculus, accompanied with the lithic-acid diathesis; also in rickets and certain forms of dyspepsia. =Ammonium Suc′cinate.= _Syn._ AMMO′′NIÆ SUC′CINAS, L. _Prep._ 1. Succinic acid, 1 part; water, 4 parts; dissolve, neutralise with solution of ammonia, or of ammonium carbonate, in slight excess, and evaporate, and crystallise as directed under the ‘benzoate’ or ‘phosphate,’——_Dose_, 2 to 10 gr. =Ammonium, Sul′phate of.= (NH_{4})_{2}SO_{4}. _Syn._ SULPHATE OF OX′IDE OF AMMONIA; AMMO′′NIÆ SUL′PHAS, L,; SULFATE D’AMMONIAQUE, Fr.; SCHWEFELSAUER AMMONIUM SALZ, Ger.; Glauber’s SECRET SALT†, G. SECRET SAL AMMONIAC†, SAL AMMONI′ACUM SECRE′TUM GLAUBE′′RI†, &c. Crude sulphate of ammonia exists in considerable quantity in the soot from pit-coal; and it is obtained, as a secondary product, from the ammoniacal liquor of gas-works and animal charcoal manufactories. These last are its chief sources. It is also found native, associated with sal ammoniac, in the neighbourhood of volcanoes, under the name of ‘_mascagnine_’ or ‘_massagnine_,’ _Prep._ 1. (Medicinal.) Saturate dilute sulphuric acid with sesquicarbonate of ammonia, in slight excess; filter, gently evaporate, and crystallise. 2. (Commercial.) From gas-liquor or bone-spirit, saturated with weak oil of vitriol, and, the clear portion of the liquid, after repose decanted, concentrated by rapid evaporation, and crystallised, in the manner noticed under AMMONIUM, CHLORIDE OF.