Page 702, at the bottom of the 3rd column of Table II, for 0.36, read 0.26. This change necessitates the following correction also.

Page 707, 3rd line from the top, for the entire amount, read much.

Page 715, 9th line from the top, for actually occurs, read occurs to a great extent. 12th line from the top, for was 0.36 mg., and precisely this amount was, read was 0.36 mg. without deducting about 0.1 mg. for solubility, whereas 0.26 mg. was.

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