about a 30-degree angle with the pane of glass, as shown in the figure. 
Table or desk lamps with flexible arms are placed close to the glass 
pane and adjusted to give maximum light and a minimum of shadow 
on the material being examined. 
The sample of seeds for examination is placed on top and to the 
rear of the glass pane. Several seeds may be examined at a time by 
glancing at the top side on the glass and at the mirror image, which 
shows the underside. As each group is examined, it is raked off the 
glass with a plastic straightedge through a funnel into a suitable 
container. 
This method has been used for the last 3 years at the Twin Falls, 
Idaho, field station, where 638,000 beans have been examined to deter- 
mine the percentage “chewed” in samples taken from chemically 
treated plots in tests for the control of the western bean cutworm 
(Loxagrotis albicosta (Sm.)). 
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