6 (HE AMERICAN MONTHLY [Apt 
ognition is easy (Figs. 4 and 5); however, a very low il- 
lumination is required. After a few weeks the trichina 
become incapsulated by the patient’s tissues, when they 
appear as small solid bodies showing a parasite tightly 
coiled in their centre. Trichina are also well preserved 
by any mounting medium containing glycerine. 
DistoMA H&MATOBIA (BILHARZ).—The adult parasite is 
probably located in the veins of the bladder, and there 
deposits its ova which find their way into the bladder or 
bowel, and appear in the urine or stools. Bilharz’s para- 
site is a common cause of bloody urinein certain geograph- 
ical districts. To detect the ova allow the urine to stand 
until all blood clots are collected at the bottom of the 
Fic. 5—Trichina spiralis. Eighth Fic. 6.-Bilharz’s parasite. (1)Ova 
week of disease. (B. L., %); (2) ova (B. L., 1-6). 
tube ; (2) lift a portion of this sediment into a pipette and 
place a drop on the centre of a slide; (3) tease the clots 
as fine as possible, and evaporate nearly to dryness ; (4) | 
add a drop of cast medium, or glycerine, to the centre of 
the specimen upon which place a cover-glass and spread 
the medium by additional pressure. The specimen should 
be placed on a flat surface for twenty-four hours while the 
mounting medium hardens, after which time a permanent 
ring may be added. For rapid diagnosis the specimen 
may be mounted in water. Detection of these ova is best 
