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3.3.20

Valuable Secrets concerning Arts and Trades... Chap. II. Secrets relative to Metals.

Valuable Secrets concerning Arts and Trades: or Approved Directions, from the best Artists, for the Various Methods... Printed by Thomas H...

29.6.19

Valuable Receipts. How to make a silver tree.

Scientific American, 6.6.1863 Mix one part of a saturated solution of nitrate of silver with twenty parts of distilled water, and pour the...

30.9.13

Lead and Mercury Poisoning

Manufacturer and builder 10 / 1877 The value of iodid of potassium to eliminate lead and mercury from the system of men whose constitution...

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