Kidney diseases, urinary deposits, and calculous disorders : their nature and treatment . nd become visible tothe naked eye as a deposit. Phosphate of lime dissolves in strong acids without effervescence;and from this solution is precipitated in an amorphous form, upon theaddition of ammonia. The salt is infusible before the blowpipe, unlessmixed with triple phosphate; and its fusibility increases according tothe quantity of the latter salt present. The lime may be recognised inthe usual way by the addition of a solution of oxalate of ammonia toa solution of the salt in acetic acid. Phosphate
Kidney diseases, urinary deposits, and calculous disorders : their nature and treatment . nd become visible tothe naked eye as a deposit. Phosphate of lime dissolves in strong acids without effervescence;and from this solution is precipitated in an amorphous form, upon theaddition of ammonia. The salt is infusible before the blowpipe, unlessmixed with triple phosphate; and its fusibility increases according tothe quantity of the latter salt present. The lime may be recognised inthe usual way by the addition of a solution of oxalate of ammonia toa solution of the salt in acetic acid. Phosphate of lime is soluble in albumen; indeed, it is by reason ofits solubility in this substance that the phosphate of lime formed by theaction of phosphoric acid on the egg-shell becomes applied to theformation of the osseous system of the embryo chick. Mucus also isa solvent of this salt, and from the mucus of the gall-bladder a con-siderable quantity is deposited as decomposition proceeds, pi. XXI,fig. 116. Phosphate of Lime in the Form of Spherules and small Dumb- % IY lHtO. POs+12aq. In the for ?-? r- ?•--. - crystal is so Bhort two Mid Che crystal, without care raX 40. J ^5 of an ncl i , PHOSPHATE OF LIME. 357 bells.—Deposits of phosphate of lime are generally granular; but aftera deposit has been allowed to stand for some days, little spherules arevery frequently found, and it is also not uncommon to meet with smalldumb-bell crystals. Crystals of the latter character are very oftendeposited in decomposing mucus, derived from several mucous surfaces,as well as in that of the urinary mucous membrane. Some of the largestof these dumb-bell crystals of phosphate of lime are represented inpi. XXI, fig. 118. They were found in the urine of a patient sufferingfrom continued fever, under the care of Mr. Carver, of Cambridge, towhom I am indebted for the specimen. A peculiar form of deposit of earthy phosphate is represented inpi. XXI, fig. 117. It consisted partl
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