The Rare EarthsNote 535 — Chapter XX · ARTIFICIAL SILK—ITS PRODUCTION AND USE IN THE MANTLE INDUSTRYReading editionE. 20747, 1901.◇[536] D. R. P. 141244.◇Copy noteReturn to CHAPTER XX ARTIFICIAL SILK—ITS PRODUCTION AND USE IN THE MANTLE INDUSTRYReturn to CHAPTER XX ARTIFICIAL SILK—ITS PRODUCTION AND USE IN THE MANTLE INDUSTRY