uikI tlic two covor.s iliawn apiirt, next fixed in ctlicr ami alcnluil, 

 staiiipil ill lia'iuatoxv I'm anl eosiii, waslicd aiul driccl. Mount in 

 tjaisain. 



Stiiilv under liiuli power. The rcil Moml corpuscles 

 are oval, somewiint llalteiied and nucleated. When seen 

 in profile they show a slight convexity in the center. Ob- 

 serve tin; white corpusrjes wliicli are smaller than the red. 

 Sketch several red, and the several t'orni.s of the white met 

 with. 



(f ) Pigeon Blood Stained in Haematoxylin and 

 Eosin. 



Oiip of the tops of a pitrf'on was amputated. From tiio llowin<i 

 lilood a small drop was canijht on tiie cover <;hiss, si)read, fixed, and 



stained in iia'matt>xylin and eosin. .Miniiit in lialsani. 



The red cells arc oval, somewhat ilattened, and nucle- 

 ated. Observe the white cells. Sketch red an<l white cor- 

 puscles. 



(g) Amoeboid Movement in White Blood Cells of 

 a Frog, 



A small (|iiantity of blood ohtaiiied from the heart of a fro'j; is 

 mixed witl; a diup of noi-mal salt sojntinn and covered with a slip. 

 To prevent evajioratioii while examininu', the cover ludass is fixed by 

 means of two or three drops of melted parafiln, so placed, that after 

 congealiiiLT, onediaif of thedro]) will rest on the slide, the other on 

 the edifc <if the cover; the seaHiiLT is then completed by means of a 

 camel's-hair brnsii wliich has been dipped in vaseline and drawn 

 about the edge of tiie cover. 



In examininir this preparation be very careful not to 

 brin*;- the end of tlie objective in contact with the vaseline 

 on the slide. Search the specimen until yoit find a white 

 blood cell of somewhat irregular shape; place it in the 

 center of the field, and make a drawing of it as it presents 

 itself to you at this time; at intervals of one or two min- 

 utes carefully repeat the sketching until about ten sketches 

 have been made. Yott will no doubt see that the cell in 

 question has changed its shape a number of times, pseu- 

 dopodia may have been thrown out and again withdrawn, 

 etc. 



