A guide to the examination of the urine in health and disease, for the use of students / by Alfred Markwick.

Date:
1847
Catalogue details

Licence: Public Domain Mark

Credit: A guide to the examination of the urine in health and disease, for the use of students / by Alfred Markwick. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    103/170 (page 93)
    consistence, for the purpose of separating the urea, and washing it with water in order to remove the alkaline salts, then drying and weighing it and afterwards incinerating it in a platinum or porce- lain capsule. By this means we get rid of tlie organic matters, viz. the uric acid and mucus, and obtain as a residue, the earthy phosphates in com- bination with silex if any be present in the urine. We have now only to weigh this when we at once ascertain the quantity of uric acid and vesical mucus, by the loss that has been sustained by inci- neration. The mucus, however, being’ as we have seen, (64) in such exceedingly minute proportion, may be neglected in the calculation. 90. Urate of Ammonia.—Deposits of this sub- stance never occur in the urine in a crystallized form, therefore are not likely to be confounded with uric acid, ( 85) but generally in an amorphous state, of a yellow, red, pink, or purple colour, and some- times nearly white. Occasionally, however, they have a ropy appearance, and are dispei’sed through the fluid like mucus or muco-pus (47a). They are known by being dissolved on the application of heat and by the addition of a solution of ammonia or potash. The hydrochloric and acetic acid, also dis- solve them with decomposition setting free the uric acid which becomes deposited, and may be recog- nized by its various chemical and microscopic pro- perties above described. (85).