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References

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  1. U. S. Patent No. 1386571; Aug.2, 1921.

Other (1)

U. S. Patent No. 1386571; Aug.2, 1921.

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Figures (2)

Figs. 1 to 12
Figs. 1 to 12

Standardizing burette.

Fig. 13
Fig. 13

Making a series of tests.