12 



THE MICROSCOPE. 



I found that I had a slide of your amphipleura from Fox Lake 

 [The striae on these a pellucida, as counted by Dr. Detmers, arc 

 116,000 to the inch. — B. W. 'I'.], and these specimens were resolved 

 without difficulty in the same way. It is certain that no light 

 comes from the adjacent diatoms or from the edges of the cover. 



Truly yours, 



S. A. Forbes. 



LABORATORY NOTES. 



}'.V C. H. STOWEI.I.. 



A PHYSICIAN residing in the central part of the state forwarded 

 a two-ounce vial to this laboratory. He said the bottle con- 

 tained a worm about six inches in length, one-eighth inch in width, 

 and quite thin. This worm was voided with the urine of one of his 

 patients, who was suffering from an acute attack of cystitis. After 

 the passage of the worm the inflammatory symptoms subsided and 

 the patient made a rapid recovery. 



In the presence of my laboratory class, 1 cut .off about a quarter 

 of an inch of this '' worm," teased it to pieces with needles, and 



FIG. I. LONGITUDINAL SE< HON OF STRAW. 



A, Spiral Vessels. B, Pitted Vssels. I . Regular Parenchymatous Cells. Drawn with 

 Camera Lucida, X 575. 



