The American journal of the medical sciences (1827)
[Thorofare, N.J., etc.] Charles B. Slack [etc.] · leaf 356
d you, and the result at which I have arrived has been universally the same. "Suppose I stand in an erect posture, then let / h, e g (Fig. 1) be any object, the parts of which are equal and similar, and of which / Ji is perpen- dicular to, and e g parallel to the horizon. Then the part/7i will… … " .Again, let a b c d (Fig. 2) be a circle ; then if the above statement be correct, when I stand erect the parts a c and b d will appear plain, but ab, c d will not, which is the fact. Furthermore, if I turn my head a risht angle (that is to a horizontal position) then ab, cd become plain, but a…
Medicine
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