ILLUSTRATIONS 



TEXT FIGURES 



Fig. 1. Special slide with preparation ready to transfer to permanent slide. 

 Glass or paper guides cemented in place, a; larger cover, b; 

 balsam droplets, c; glass rodlets, d; smaller cover placed over 

 the ruled square on the slide, e; depression in slide for forceps, 

 /; material, the nine round bodies. Somewhat enlarged. 



2. Sectional view of permanent mount. Slide, s; larger cover, b; 



smaller cover, k; glass rodlets, d; balsam, c; material, m. About 

 2g times natural size. 



3. Smaller washing apparatus made from a calcium chloride tube. 



Diaphragm of cork or rubber, d; filter paper, /; material, m; 

 filter paper wicks, w and w' ; glass tube, t; rubber connection, 

 r; cork hanger, c; supply of water, s; base of stand, b. X J. 



4. Larger washing apparatus made from a flask. Diaphragm of 



cork or rubber, d; filter paper, /; material, m; plug, p; support- 

 ing rod, n; rubber stopper with two holes, s; glass tubes, t and t' ; 

 rubber connection, c; base, b; filter paper wicks, w and w' ; supply 

 of water, x; wick in front view of lip, w" . X i- 



5. A sketch of cells of a coenobium included within an area of 8,100 sq. 



M indicated by the portion of the square-ruled ocular micrometer 



sketched at the same time. In practice the grouping lines, here 



drawn dotted, are drawn in red ink. The upper right square was 



not used because of some interfering object, the appended square 



at the right being substituted for it. 



261 



