Figure 7.--Sampling clump 
of grass for populations 
of brown wheat mite. 
Figure 8.--Celluloid counting 
card inserted between glass 
slides and metal clip. 
White counting areas are 
1/4 inch wide. 
Figure 9.--Apparatus used 
in cleaning slides: A, 
Wire basket of clips ready 
for soaking in solvent; B, 
basket of clips; C, cream 
can containing solvent for 
cleaning slides; D, solvent 
for cleaning clips. 
SOI VENS 
‘i 
OL | PS 
