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Page 971
One frame of material is partly visible in the left - hand window . The student writes his response on a strip of paper exposed at the right . He then lifts a lever with his left hand , advancing his written response under a transparent ...
One frame of material is partly visible in the left - hand window . The student writes his response on a strip of paper exposed at the right . He then lifts a lever with his left hand , advancing his written response under a transparent ...
Page 975
The responses made to his material may reveal surprising ambiguities . Unless he is lucky , he may find that he still has something to learn about his subject . He will almost certainly find that he needs to learn a great deal more ...
The responses made to his material may reveal surprising ambiguities . Unless he is lucky , he may find that he still has something to learn about his subject . He will almost certainly find that he needs to learn a great deal more ...
Page 1622
The information carried by X - rays showing the distribution of each material of which a subject is assumed to be composed is distributed on separate films by means of a controlled variation in composition of the scanning radiation .
The information carried by X - rays showing the distribution of each material of which a subject is assumed to be composed is distributed on separate films by means of a controlled variation in composition of the scanning radiation .
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