. The life insurance examiner. A practical treatise upon medical examinations for life insurance . xalate of lime and an amorphous deposit of the urates. I. URIC ACID.—This is the product of a metamorphosis of tissue. Acharacteristic test for it is effected by the addition of a few drops of nitricacid to the suspected deposit, which has previously been placed in a capsule The Life Insurance Examiner. 89 the mixture is then to be strongly agitated ; a drop of ammonia is added,which instantly produces a rich purple tint. But both uric acid and theurates can be more easily and quickly determined
. The life insurance examiner. A practical treatise upon medical examinations for life insurance . xalate of lime and an amorphous deposit of the urates. I. URIC ACID.—This is the product of a metamorphosis of tissue. Acharacteristic test for it is effected by the addition of a few drops of nitricacid to the suspected deposit, which has previously been placed in a capsule The Life Insurance Examiner. 89 the mixture is then to be strongly agitated ; a drop of ammonia is added,which instantly produces a rich purple tint. But both uric acid and theurates can be more easily and quickly determined by the microscope. Crystals of uric acid, notwithstanding that they vary in size and form,are very readily distinguished. To obtain them rapidly, a portion of thesuspected deposit is dissolved in a drop of liquor potassas, and this alkaiinesolution is then treated with acetic acid, and in the lapse of a few hours thecrystals of uric acid will be formed. When we find the amount of acid diminished in the urine, we suspectthe more advanced stages of Brisjhts disease, but an increase should lead. Beautiful crystals of triple or ammonio-magnesian phosphate and spherules of urateof soda, x 215. (After Lcalc.) us to suspect a rheumatic diathesis, a tendency to acute inflammation, gas-tric or hepatic disorders or intemperance. Urates.—The pathological conditions in which the urates are found,are much the same as those in which uric acid occurs. The urates consist principally of urate of soda and of ammonia, and ofsmall quantities of urate of lime and magnesia, and the deposits formed ontheir precipitation are usually pink, brown or white. They are dissolvedwith great readiness on heating the urine. Acids decompose them. Un-der the microscope, the urates are seen to be either irregular amorphousparticles, round globules or needle-like crystals. Urate of soda is shownin the shape of round globules of various size, from some of which fineneedles project. Urates of soda and of ammonia
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