A manual of clinical medicine and physical diagnosis . c or hydrochloric acid; it isreadily soluble in liquor ammonias. A greasy-lookingpellicle, consisting of crystals of cystine and ammonio-phosphate of magnesia, soon forms on cystic a few drops of an ammoniacal solution of cystineare allowed to evaporate spontaneously on a piece ofglass, crystals in the form of six-sided laminae will beseen ]3y the microscope. See Fig. 11, c. Oxalate of Lime.—Oxalate of lime is often present inthe urine, and is a constituent of one of the most annoy-ing forms of calculi. The urine is generally of
A manual of clinical medicine and physical diagnosis . c or hydrochloric acid; it isreadily soluble in liquor ammonias. A greasy-lookingpellicle, consisting of crystals of cystine and ammonio-phosphate of magnesia, soon forms on cystic a few drops of an ammoniacal solution of cystineare allowed to evaporate spontaneously on a piece ofglass, crystals in the form of six-sided laminae will beseen ]3y the microscope. See Fig. 11, c. Oxalate of Lime.—Oxalate of lime is often present inthe urine, and is a constituent of one of the most annoy-ing forms of calculi. The urine is generally of a fine darkamber hue, of a specific gravity varying from 1015 to GRAVEL IN THE URINE. 849 1025, natural in quantity, and free from any precipitate—unless there be also an excess of urates. The deposit isinsoluble in liquor potassa? and acetic acid, but soluble innitric acid. Examined by the microscope, crystals, inthe form of transparent octahedra witli sharply-dctinededges and angles, will be detected ; if the light be bright, Fig. 10. Fig. Common forms of ammonio-mag-nesiaa phosphates. «/Oxalate of lime (octahedra). b. Dumb-bell crystals of oxalate of lime. c. Cystine. these crystals generally resemble cubes marked with across. Very rarely, the crystals are shaped like dumb-bells, or like two kidneys with their concavities opposed,and are believed to be formed in the kidney itself CrjS-tals are also found in casts, and in mucus. See , a, h. Gravel in the IJrine.—When a patient dischargesgritty powder, or sand, or small calculi, with the urine,he is commonly said to have a fit of the gravel. Themost common forms of gravel are the urates of lime,potash, and soda, with a small quantity of ammonia,often called lithate or urate of ammonia. ISText in fre-quency we find lithic or uric acid, or red sand ; then adeposit, consisting mainly of the triple phosphate of am-monia and magnesia, mixed with amorphous phosphateof lime ; next a deposit of oxalate of lime; and,
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectdiagnosis, bookyear18
