Online Catalogue with all Lots / Auction 157
Wertvolle Bücher, Graphik, Historische Photographie
Friday, 24 October 2025 at 11:00 am Lose 1- 1105
Saturday, 25 October 2025 at 11:00 am Lose 1106-2003
Lot 1250 Lötrohrprobierkasten zur …
Lötrohrprobierkasten zur Untersuchung von Mineralien.
Geologie
Naturwissenschaften – Lötrohrprobierkasten mit einem Lötrohr, Pinzette, Hammer, einer kleinen Lupe und einem kleinen Mörser, sowie 10 kleinen Gefäßen mit mineralischen Proben. - Die Lötrohrporbierkunst ermöglicht eine Untersuchung von mineralischen Proben bei sehr hohen Temperaturen. Durch das gekonnte Durchblasen durch das Lötrohr in eine Falmme kann man eine Oxidations- oder eine Reduktionsflamme erzeugen und somit unterschiedliche Tests durchführen. Das Verfahren wurde erstmals Mitte des 18. Jahrhunderts dokumentiert. Jedoch erst ein Jahrhundert später wurde in Freiburg gewann die Lötrohrkunst an Popularität, als sie durch die Schriften von Carl Friedrich Plattner vollendet wurde. - Risse im Holzkasten, Samt leicht fleckig. Insgesamt gut erhalten, inklusive Proben.
Natural Sciences – Geology. - Flaming tube testing kit for examining minerals. - Flaming tube testing kit with a flaming tube, tweezers, hammer, small magnifying glass, small mortar, and 10 small containers with mineral samples. - The art of soldering tube testing allows mineral samples to be examined at very high temperatures. By skillfully blowing through the soldering tube into a flame, an oxidation or reduction flame can be created, allowing different tests to be carried out. The process was first documented in the mid-18th century. However, it was not until a century later that the art of the blowpipe gained popularity in Freiburg when it was perfected by the writings of Carl Friedrich Plattner. - Cracks in the wooden box, velvet slightly stained. Overall in good condition, including samples.
Startprice: 800 €
Estimate: 1200 €
Premium and taxation
This work is subject to under the regular margin scheme. There is a 24.95% buyer's premium on the hammer price and inside the EU 7% (Books, Paintings, Drawings and most Prints) and 19% (Photographs, Screen and Offsetprints, Autographs and Manuscripts) VAT on the final invoice amount.
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On the sales proceeds of all original works of fine art and photography, whose authors have not yet died 70 years before the end of the sale, an additional 2% (subject to change) of the hammer prices from 400€ will be charged pro rata for the VG Bild-Kunst, which represents the copyrights of visual artists according to § 26 UrhG.
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