NORMAL HJEMATOLOGY 



133 



then begin the actual estimation by counting all the corpuscles in 

 the first marked space, including those that are on the upper and 

 left-hand lines of the space. Then count those in the space to the 

 right, including the corpuscles on the upper and left-hand lines as 

 before. Continue counting each space to the right until six spaces 

 are counted ; then drop down to the next space below and count 



Appearance of slide under about 500 diameters magnification. One counts all corpuscles 

 which lie upon the upper and left boundaries of each square. 



each space to the left until six spaces in the second row are counted. 

 Then drop down to the next row of spaces and continue counting 

 back and forth in the same manner until six rows of six spaces each 

 are counted, as shown in Fig. 68. Place the results of counting on 

 paper in the same relation to each other as the spaces illustrated, 

 as follows: 



= 221 



221 -v- 36 = 



Having made the count, the slide and cover-glass should be cleaned 

 as previously described. The pipette, which has been left in a hori- 



