Archive image from page 498 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 Urine depositing the first of these two varieties of sediment is generally of lighter colour than natural, and of moderately high specific gravity. The second variety, if not occasioned by the use of alkaline remedies, generally indi- cates important mischief in some part of the urinary apparatus, and is often combined with large quantities of epithelium, mucus, pus, and blood corpuscles. DEPOSIT OF OXALATE OF LIME. This deposit, which is composed of lime in
Archive image from page 498 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 Urine depositing the first of these two varieties of sediment is generally of lighter colour than natural, and of moderately high specific gravity. The second variety, if not occasioned by the use of alkaline remedies, generally indi- cates important mischief in some part of the urinary apparatus, and is often combined with large quantities of epithelium, mucus, pus, and blood corpuscles. DEPOSIT OF OXALATE OF LIME. This deposit, which is composed of lime in combination with an acid foreign to the con- stitution of healthy urine, presents itself under the microscope in the following forms, first described by Dr. Golding Bird (fig. 795). Fig. 795. o The appearance of dark crystals, looking like cubes, is observed when this deposit is allowed to dry. The transparent spot in the centre is caused by reflection from the sides of the octohedron. Urine depositing oxalate of lime is generally of about the normal specific gravity. It oc- casionally has a light greenish hue. The de- posit when allowed to collect in a glass vessel is rarely seen otherwise than as a floating cloud collecting at bottom, and closely re- sembling the appearance which would be put on by the presence of an excess of the mucus of the bladder natural to the urine. It has recently been stated, by Dr. Frick, of Baltimore, that the crystalline masses, in the form of dumb-bells, described by Dr. Bird as consisting of oxalate of lime, are really com- posed of lithic acid. It is true that lithic acid occasional}' assumes a form more or less re- sembling the dumb-bells figured by Dr. Bird, but scarcely so nearly as to be easily mis- taken for them. Dr. Harris Wilson has also recently shown that lithic acid may be made to assume a form nearly approaching in character to the dumb-bells. I have ex- amined, with Dr. Bird, some specimens of the dumb-bells, and am satisfied
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