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Smithsonian logarithmic tables to base e and base 10

Smithsonian logarithmic tables to base e and base 10

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Studies of Arctic foraminifera

Studies of Arctic foraminifera

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The reproduction of cockroaches

The reproduction of cockroaches

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Early Cenozoic vertebrates in the red conglomerate at Guanajuato, Mexico

Early Cenozoic vertebrates in the red conglomerate at Guanajuato, Mexico

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Revision of the flea genus Peromyscopsylla

Revision of the flea genus Peromyscopsylla

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A method for the measurement of atmospheric ozone using the absorption of ozone in the visible spectrum

A method for the measurement of atmospheric ozone using the absorption of ozone in the visible spectrum

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Revision of some glanduline Nodosariidae (Forminifera)

Revision of some glanduline Nodosariidae (Forminifera)

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Revision of some recent foraminiferal genera

Revision of some recent foraminiferal genera

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The medical and veterinary importance of cockroaches

The medical and veterinary importance of cockroaches

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A new theory on Columbus's voyage through the Bahamas

A new theory on Columbus's voyage through the Bahamas

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Morphology and taxonomy of the foraminiferal genus Pararotalia Le Calvez, 1949

Morphology and taxonomy of the foraminiferal genus Pararotalia Le Calvez, 1949

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The biotic associations of cockroaches

The biotic associations of cockroaches

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Comparison of Tektite specimens from Empire, Georgia, and Martha's Vineyard, Massachusetts

Comparison of Tektite specimens from Empire, Georgia, and Martha's Vineyard, Massachusetts

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Echinoid distribution and habits, Key Largo Coral Reef Preserve, Florida

Echinoid distribution and habits, Key Largo Coral Reef Preserve, Florida

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Silicified Ordovician brachiopods from East-Central Alaska

Silicified Ordovician brachiopods from East-Central Alaska

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The birds of the Republic of Panama

The birds of the Republic of Panama

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Surface conditions of the Orgueil meteorite parent body as indicated by mineral associations

Surface conditions of the Orgueil meteorite parent body as indicated by mineral associations

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Sediment transport on Sable Island, Nova Scotia

Sediment transport on Sable Island, Nova Scotia

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A long-range forecast of temperature for 19 United States cities

A long-range forecast of temperature for 19 United States cities

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Morphology and systematics of the bryozoan genus Metrarabdotos

Morphology and systematics of the bryozoan genus Metrarabdotos

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Identity of Palaeonympha avinoffi Schaus, a Satyrine Butterfly from China (Lepidoptera: Nymphalidae)

Identity of Palaeonympha avinoffi Schaus, a Satyrine Butterfly from China (Lepidoptera: Nymphalidae)

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Phylogenetic analysis of lineage relationships among hyperiid amphipods as revealed by examination of the mitochondrial gene, cytochrome oxidase I (COI)

Phylogenetic analysis of lineage relationships among hyperiid amphipods as revealed by examination of the mitochondrial gene, cytochrome oxidase I (COI)

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Evidence for Young Volcanism on Mercury from the Third MESSENGER Flyby

Evidence for Young Volcanism on Mercury from the Third MESSENGER Flyby

Smithsonian Libraries
During its first two flybys of Mercury, the {MESSENGER} spacecraft acquired images confirming that pervasive volcanism occurred early in the planet's history. {MESSENGER's} third Mercury flyby revealed a 290-km-diameter peak-ring impact basin, among the youngest basins yet seen, having an inner floor filled with spectrally distinct smooth plains. These plains are sparsely cratered, postdate the formation of the basin, apparently formed from material that once flowed across the surface, and are therefore interpreted to be volcanic in origin. An irregular depression surrounded by a halo of bright deposits northeast of the basin marks a candidate explosive volcanic vent larger than any previously identified on Mercury. Volcanism on the planet thus spanned a considerable duration, perhaps extending well into the second half of solar system history.

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Revisiting silicon budgets at a tropical continental shelf: Silica standing stocks in sponges surpass those in diatoms

Revisiting silicon budgets at a tropical continental shelf: Silica standing stocks in sponges surpass those in diatoms

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