The Microscope. 9 



Figure 2. Ch. spinosulus, sp. nov. ; dorsal aspect. 



Figure 3. Egg of Ch. spinosulus. 



Figure 4. Ch. octonarius, sp. nov. ; dorsal aspect. 



Figure 5. Ch. loricatus, sp. nov. ; ventral aspect of head. 



Figure G. Gh. concinnus, sp. nov. ; posterior dorsal region. 



Figure 7. Ch. Slackice, Gosse; outline of head. (After Gosse.) 



Figure 8. Ch. longispinosus, sp. nov. ; lateral view of posterior 

 dorsal region. 



Figure 9. CK longispinosus, dorsal aspect. 



Figure 10. Ch. longispinosus, intestinal cells. 



Figure 11. Ch. larus, Ehr. ; optical section of posterior part; 

 a, ovary, b, intestine; c, testes (?); d, caudal gland. 



Figure 12. Ch. enormis, sp. nov.; dorsal aspect. 



Figure 13. Ch. acanthophorus, sp. nov. ; dorsal aspect. 



Figure 14. Ch. acanthophorus, dorsal spine. 



Figure 15. Ch sulcatus, sp. nov. ; posterior dorsal region. 



(To be continued.) 



THE MICROSCOPIC EXAMINATION OF URINARY 

 DEPOSITS. 



FIRST PAPER. 



C. G. JENNINGS, M. D., 

 Professor of Chemistry and Diseases of Children, Detroit College of Medicine. 



'' I HE microscopic examination of urinary deposits is of much 

 -■- value in modifying and correcting the results of the chemical 

 analysis. A little attention to the details of technique is necessary, 

 even in this simple procedure, and is well repaid by the greater 

 accuracy with which the examination can be made. 



The urine should be placed in a vessel that will enable the 

 sediment to fall into as small a space as possible, covered to exclude 

 dust, and set aside in a moderately cool place for ten or twelve 

 houi's. The best vessel for the purpose is a glass cylinder one inch 

 in diameter and about six inches long. The urinometer glass, or a 

 large test-tube on foot, answers the purpose well. The conical wine 

 glasses, often recommended, are open to the objection that the sedi- 

 ment collects all along the sides as well as at the apex of the cone. 

 When the sediment is scanty, and when a careful search for casts, 

 etc., is demanded, the urine containing the sediment may be taken 

 from the bottom of the cylinder with a pipette, and transferred to 

 a small test tube and allowed to stand for a few hours longer. The 

 deposit in the bottom of this tube will be so concentrated that no 

 object in it can well escape scrutiny. 



