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| Transcriber's Note |
| |
| Nine printer errors have been corrected, all of them wrong or |
| missing full-stops or commas. Also, in the completion tests which |
| start at line 5972, the words to be omitted, which were italicised |
| in the original, have instead been surrounded by curly brackets |
| to aid readability. In all other cases, italics are denoted by |
| underscores and bold by equals signs. |
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Teacher Training Series
EDITED BY
W. W. CHARTERS
_Professor of Education, Carnegie Institute of Technology_



THE SCIENCE OF