1. The Boot and Shoe Manufacturers' Assistant and Guide.
Containing a Brief History of the Trade. History of India-rubber and Gutta-percha, and Their Application to the Manufacture of Boots and Shoes. Full Instructions in the Art, With Diagrams and Scales, Etc., Etc. Vulcanization and Sulphurization, English and American Patents. With an Elaborate Treatise on Tanning.
    Ücretsiz Oku %60
  2. Patent Sahipleri İçin Pratik İpuçları

    Franklin Allison Cresee

    Ücretsiz Oku %67
  3. Tom Swift ve Hava Keşifi; Ya da, Amca Sam'ın Göklerin Hakimiyeti

    Victor Appleton

    Ücretsiz Oku %67

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