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Der Seidenspinner Des Maulbeerbaumes, Seine Aufzucht Und Seine Krankheiten

Der Seidenspinner Des Maulbeerbaumes, Seine Aufzucht Und Seine Krankheiten


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About the Book

Dieses historische Buch kann zahlreiche Tippfehler und fehlende Textpassagen aufweisen. Kaufer konnen in der Regel eine kostenlose eingescannte Kopie des originalen Buches vom Verleger herunterladen (ohne Tippfehler). Ohne Indizes. Nicht dargestellt. 1871 edition. Auszug: ...zwar gleichfalls in Anwendung gebracht, jedoch bald wieder aufgegeben, da durch diese beiden Gase die Qualitat der Seide eine bedeutende Verringerung erleiden musste. Alle diese Behelfe kamen nie zu einer allgemeinen Anwendung und man beschrankte sich im Grossen und Ganzen auf heisse trockene Luft, sowie auf heisse Wasserdampfe, obwohl man sich nicht verhehlte, dass man in dem einen wie im anderen Falle Gefahr lief, bei unvorsichtiger Operation die Qualitat dar Cocons wesentlich zu beeintrachtigen. Das Abtodten der Puppen durch die heisse Luft in Backofen war fur kleine Zuchter immer das beliebteste, aber auch das gefahrlichste Mittel, da sich in denselben nie der gehorige Temperaturgrad herstellen lasst. Entweder werden dann die Cocons versengt und wegen der Bruchigkeit ihrer Faden vollig werthlos, oder aber werden die Puppen nicht vollig getodtet und es erwachst ein grosserer oder geringerer Schade in Folge des Ausschlupfens eines Theiles der Schmetterlinge. Man hat behufs der Abtodtung der Cocons Oefen construirt, die mit einer Heizkammer umgeben sind, aus welcher die erhitzte Luft in einem daruber befindlichen, mit den Cocons gefullten Kasten gelangt; man wendete Wasser-oder Marienbader an, indem in einen grosseren, halb mit siedendem Wasser gefullten Kessel ein kleineres mit den zu todtenden Cocons angefulltes verschlossenes Gefass eingesenkt wurde; man hat Zimmer mit Luftheizung eingerichtet, in welchen die Temperatur bis auf 50 ss. gesteigert werden kann. Wenn auch die letztere Einrichtung als eine der vorzuglicheren hervorgehoben..."


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Product Details
  • ISBN-13: 9781153497497
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 88
  • Spine Width: 5 mm
  • Width: 189 mm
  • ISBN-10: 1153497492
  • Publisher Date: 05 May 2014
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 172 gr


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