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LOT 2210
Natural History - Fossil Declivolithus Trilobite
ORDOVICIAN PERIOD, CIRCA 450 MILLION YEARS B.P.
4 3/8 in. (239 grams, 11 cm).
A rare Declivolithus sp. (Nankinolithus) trilobite on matrix; some restoration. [No Reserve]
ProvenanceFrom the Upper Ordovician Lower Ktaoua Formation
From a Cambridgeshire, UK, collection.
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AUCTIONS:
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Natural History - Amethyst Crystal Geode Section
Sold for (Inc. bp): £33
A cut section of amethyst crystals of good colour. 555 grams, 92 mm
Ex Lincolnshire, UK, collection. -
Natural History - Mineralogical Geometry Set
French, circa 1850 A.D.Sold for (Inc. bp): £2,340
A rare complete set of folded-card polyhedrons, each with extensive printed notes on the surfaces, dimension and properties; to be assembled from the 120 components into two adjacent cuboids within a wooden box with hinged lid and paper insert announcing 'Géométrie Stéréométrique -ou- Décomposition du cube en polyèdres réguliers, irréguliers et corps ronds... par L. Dupin Ing.eur' (Stereometric Geometry or the disassembly of the cube into regular and irregular polyhedrons and cylinders... by L. Dupin, Inventor). 463 grams total, 23.3 x 12.3 x 6.7 cm (case)
Private American collection, New York, USA. This lot has been checked against the Interpol Database of stolen works of art and is accompanied by search certificate no.12065-211002.
The box contains an educational set of geometric shapes comprising 120 individual three-dimensional cardboard pieces with printed names and numbers corresponding to the key, arranged in various smaller interlocking configurations. The producer, Louis Dupin de la Guérinière, was a French civil engineer who began to produce and sell folded models to show the physical properties of polyhedrons. His models were intended not only as educational aids for students of mathematics, but also for those whose work involved perspective drawing, stone-cutting and mineralogy. The sets began production in the 1840s and were a popular study-aid. The present example has an adhesive label in the lid naming the supplier as Crosti of Rue Ste. Catherine, Bordeaux, France. -
Natural History - Fossil Deltadromeus Theropod Dinosaur Vertebra
Cretaceous Period, circa 90 million years B.P.Sold for (Inc. bp): £33
A vertebra with neural arch from the dinosaur Deltadromeus agilis. 247 grams, 87 mm
From the Kem-Kem Basin, Morocco, North Africa. From an old German paleontological collection.
Deltadromeus meaning 'delta runner' has extraordinarily delicate and long limbs making it one of the fastest dinosaurs to have existed. This meat-eating dinosaur is an early off-shoot of the theropod line on northern continents that gave rise to Tyrannosaurus and the raptor Deinonychus.
