GEOGRAPHICAL FACTORS IN CALCIUM METABOLISM*

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Abstract
425 partially selected young adults showed average blood Ca 10.34 mgm. %; extremes 4.0-16.6. Normal limits should be 8.5-12.4 mgm. %. 19, or 50%, of his series below 8.5 mgm. were clinically diagnosed spasmophilia. Water analysis of 2 rivers in Washington state showed average 11.2 parts Ca per million parts against 81 parts per million for 16 rivers of Missouri river basin. Western slope land and foodstuffs of the Cascade Mountains are deficient in lime. The deficiency of Ca in the Puget Sound Basin of Washington may be compared with the I deficiency in goitre regions and the disturbed Ca metabolism of that region may have its etiology in geographical factors.

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