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APPENDIX 
have mastered it in one week and in no case has any clerk re 
quired more than ten days to learn it. Many of these tests 
are now given by clerks, a thing which is possible only because 
of the care with which this technique has been worked out. 
The arithmetical work has been still further simplified by means 
of tables. In fact, by the time a subject finishes the test, the 
examiner has almost finished computing the results. 
i. Eyesight Test 
Description: The Lowell chart and the Jaeger reading card 
are used. 
Instructions: The eyesight test should be given by the medical 
examiner as a part of the physical examination. Where 
this is impracticable, the subject may simply be asked to 
read or to spell the lines on the Jaeger card and the Lowell 
chart according to standard practice, and the results 
recorded. 
Standards: The sharpness of sight required will necessarily 
depend on the kind of work to be done. No exact corre 
lations between eyesight and production have yet been 
established. The decision must therefore rest largely on 
expert judgment. For inspectors, 20/15 or 20/20 is desir 
able. Clerks can easily get along with vision ranging 
anywhere between 20/15 ar >d 20/40. 
Suggestions: The importance of an eyesight test for work re 
quiring good eyesight seems so obvious as not to need em 
phasis. However, the number of industries paying atten 
tion to this fact is absurdly small. 
2. Card Sorting (simple) 
Description: 
See Chapter II. 
Instructions: 
“I am going to give you a pack of cards like this (showing 
face of card in sample pack of six) which you are to sepa