The Rare EarthsNote 537 — Chapter XX · ARTIFICIAL SILK—ITS PRODUCTION AND USE IN THE MANTLE INDUSTRYReading editionVide Buhlmann, D. R. P. 188427, 1907; also E. 6828, 1907.◇Copy noteReturn to CHAPTER XX ARTIFICIAL SILK—ITS PRODUCTION AND USE IN THE MANTLE INDUSTRY