Spar Collection

Iceland spar
A specimen of Iceland spar from Rodefjord, Iceland. Transparent crystal composed of the mineral, calcite (calcium carbonate) which has unusual property of double refraction

Plate 1 from Histoire naturelle? (1789)
Plate 1 Histoire Naturelle ou Mineralogie Complete, from Histoire naturelle: ou, Exposition des morceaux, les mieux choisis pour servir? (1789) by by Swebach Desfontaines

Trades in Regency England: Spar ornaments, pottery ware and salt refiner. Alabaster stone ornaments made in the Peak District on a mantlepiece 52, shop window with pottery from Etruria

Trades in Regency England: Ale-house, silk mill and stocking weaver. Customers drinking Burton ale outside a pub 49, workers dying and drying silk in a mill in Derby 50

Pigeon Scout
Pigeon Fraser Scout 117, delivered to Langley Field November 1917, transferred o McCook Field for testing, but crashed soon after taking off on its first flight, killing the pilot

Boxing al Fresco Date: 1845

Calcite (Calcium Carbonate) variant iceland spar
A cleaved rhomb of iceland spar showing double refraction from near Eskifjordr, Iceland

Spar boxing contest on board the R. M. S. P. Atlantis
One of the combatants down in a spar boxing contest aboard the Blue Star Line cruiser Arandora Star. Date: 1931

6500kw twin wheel aerogenerator hexagon spar tower
Plan of 6500kw twin wheel aerogenerator hexagon spar tower by P H Thomas, 1944 Date: 1944

Calcite (Iceland spar)
A specimen of Iceland spar from Rodefjord, Iceland. Transparent crystal composed of the mineral, calcite (calcium carbonate) which has unusual property of double refraction

SPARRING
Two pugilists spar as a gathering of men enjoy the action

St Elmos Fire on Spar
Sailors in the rigging alarmed by the appearance of St Elmos Fire at the tip of a spar

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