VIII. ACIDS.—MuRiATic. 303 



Acidum muriaticum, P. L. Decrep. salt 5xxiv, oil of vitriol 

 jxx ; distil into a pint of water; spec. grav. should be TIT, and 

 100 gr. ought to saturate 124 gr. of subcarbonate of soda. — Offi- 

 cinal preparation. Murias Barytae, E, Solutio muriatis calcis, 

 E. D. Tinctura ferri muriatis, L, E. D. Hydrosulphuratum 

 ammonite, E. 



Henrys muriatic acid for assays. IVIuriatic acid diluted to 

 gr. rOT4, so that a measure of it will saturate an equal measure 

 of subcarbonate of potash-water, or of pure ammonia-water, or 

 two measures of pure potash-water, or of pure soda-water, or of 

 subcarbonate of soda-water, or of subcarbonate of ammonia- 

 water. 



A. muriaticum, P. Bat. Water 6 oz., boiled German oil of 

 vitriol 12 oz. ; mix, pour it upon decrep. salt 18 oz, in a retort 

 connected with a receiver and two bottles; the first bottle contain- 

 ing water 4 oz. ; the second 6 oz. ; distil, mix the acid in the 

 receiver and first bottle : that in the second bottle, being weaker, 

 - kept for ordinary uses. If the strong acid brings over any 

 alphuric acid, it should be rectified upon salt 2 oz. 



A. muriaticum, P. Belg. Water 9 oz., oil of vitriol 24 oz. ; 

 mix, pour u|X)n decrep. salt 30 oz., in a large glass body, lengthen 

 the nose of the head by a pipe passing nearly to the bottom of a 

 long-necked receiver containing water 15 oz., and the joint merely 

 secured by a roll of paper. Distil till the charge begins to grow 

 solid ; then take off the receiver, and apply another containing 

 water H oz. The first receiver contains a very pale, smoking, 

 concentrated acid, of 22 deg. Baume, free from sulphuric acid ; 

 the second a very strong, but coloured acid, contaminated with a 

 little sulphuric acid. 



Muriatic acid distilled in iron, Acide hydrochlorique des cylin- 

 dres. 20 cast-iron cylindrical retorts, about 5 feet long, and 18 

 inches over, arc usually placed in one stack of furnaces, with a 

 fire-room to each pair. Each retort is charged with 1601b. of 

 salt, heated, and then 1281b. of oil of vitriol, at 66 deg. Baume; 

 or, which is better, 1331b. at 64 deg. are poured in. The vapours 

 are passed into 1.501b. of water, contained in 4 eight-gallon bottles 

 connected by bent pipes, the first of which is set in a trouf^h of 

 running water. The produce is about 2081b. of yellow, smoking, 

 austere acid, at 23 deg. Baume, equal to sp. grav. 1*19, from each 

 retort: that collcctca in the first bottle contains sulphuric acid, 

 and sometimes muriate of iron, and sulphate of soda. 



Muriatic acid ohtaincd in rnannfactnrim/ suhcarJuniatc of soda, 

 Acide hydrochlorifjup des hastrinynes. Salt 2,4001b., oil or vitriol 

 jS,640lb., at .04 fieg. Baume, distilled in a leaden pan, covered 

 with the ca«t-iron under plates of a flue passing over and then 

 voder the leaden pan ; the vapour is passed into several series of 



