Page "learned" Paragraph 48
from
Brown Corpus
Experimental procedures
samples
Douglass prepared his sample of Af by thermal decomposition of aqueous chromic acid at 300 - 325-degrees-C.
Dr. Douglass was kind enough to lend us about 5 grams of his material.
This material proved to be unsatisfactory, since we could not obtain reproducible results on various portions of the sample.
Subsequently, we learned from Douglass that his sample contained a few percent Af impurity.
Since Af is ferromagnetic, we felt that any results obtained from the magnetically contaminated Af would be suspect.
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