
Reise Nach Guinea Und Brasilien 1639-1645
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The processes involving the working of viscous hot glass-the only topic of this book-are basically different from those customary in other technologies. The strong temperature dependence of the working properties of glass, particulary of its viscosity, require the exact .co- ordination of cooling and forming. For this reason the temperature conditions in the forming parts of the machine and the timing of the process are of prime importance.
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