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4y Report this comment Wonderful study to confirm the DNPH method for formaldehyde

Retrieved February 25, 2020

Whenever I discovered an interesting trail leading to Negro books I invariably found that Schomburg had either been on it before me or else was following very close behind. Spingarn recalled occasions when he saw Schomburg approach an immense pile of apparently worthless material and unerringly find in its huge mass one or two treasures which would have been lost to a less inspired collector