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Quote of the day for November 10, 2024
Words are, of course, the most powerful drug used by mankind. -- Rudyard Kipling

On this beautiful day of

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10
November
08:25 UTC
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European spruce bark beetle
The European spruce bark beetle (Ips typographus), is a species of bark beetle in the true weevil family, Curculionidae. It is found in Europe and Asia Minor and east to China, Japan, North Korea and South Korea. Bark beetles are so named because they reproduce in the inner bark, living and dead phloem tissues, of trees. Their preferred trees in which to reside include spruces, firs, pines and larches. The species has the ability to spread quickly over large areas and some scientists hypothesize that long-distance movements originating from the Iberian Peninsula may have contributed to its invasion of northern Norway spruce forests. This female European spruce bark beetle was photographed in Naninne in the province of Namur, Belgium.Photograph credit: Ivar Leidus


Pyromorphite

Pyromorphite is a mineral species composed of lead chlorophosphate: Pb5(PO4)3Cl, sometimes occurring in sufficient abundance to be mined as an ore of lead. First distinguished chemically by Martin Heinrich Klaproth in 1784, it was named pyromorphite by Johann Friedrich Ludwig Hausmann in 1813. It is usually green, yellow or brown in color, with a resinous lustre. Crystals are common and have the form of a hexagonal prism terminated by the basal planes, sometimes combined with narrow faces of a hexagonal pyramid. Other forms include crystals with a barrel-like curvature and globular or reniform masses. Pyromorphite is part of the apatite group of minerals and bears a close resemblance physically and chemically with two other minerals, mimetite and vanadinite. This focus-stacked photograph, merged from 26 separate images, shows a sample of pyromorphite extracted from the Resuperferolitica Mine in Santa Eufemia, in the Spanish province of Córdoba. The sample measures 3.5 cm × 3.0 cm × 1.5 cm (1.38 in × 1.18 in × 0.59 in).

Photograph credit: David Ifar

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John Tarleton

John Tarleton (8 November 1811 – 25 September 1880) was a Royal Navy officer who went on to be Second Naval Lord. He was given command of the fifth-rate HMS Fox in 1852, of the frigate HMS Eurydice in 1855 and of the frigate HMS Euryalus in 1858: he led the latter ship as an element of the Channel Squadron and then of the Mediterranean Squadron. Tarleton served as Junior Naval Lord from 1871 and then as Second Naval Lord from 1872 to 1874. He was promoted to Vice Admiral in 1875 and retired in 1879. He is seen here in an 1860 photograph by John Jabez Edwin Mayall.

Photograph credit: John Jabez Edwin Mayall; restored by User:Adam Cuerden