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$0.25-inch refracting telescope$

0.25-inch refracting telescope

English

1790-1820

0.75-inch ball conductor mounted on a rod

0.75-inch ball conductor mounted on a rod

French

1800-1850

1.5-inch ball conductor

1.5-inch ball conductor

English

1775-1850

1.5-inch ball conductor

1.5-inch ball conductor

English

1775-1825

1.5-inch ball conductor

1.5-inch ball conductor

French

19th Century

1.7-inch ball conductor

1.7-inch ball conductor

French

19th Century

1.25-inch ball conductor

1.25-inch ball conductor

French

19th Century

1.25-inch ball conductor mounted on a rod

1.25-inch ball conductor mounted on a rod

French

19th Century

1.25-inch ball conductor mounted on a rod

1.25-inch ball conductor mounted on a rod

French

19th Century

$1.25-inch refracting telescope$

1.25-inch refracting telescope

English

1800-1830

1.25-inch terrestrial globe with case

1.25-inch terrestrial globe with case

English

19th Century

1-foot Gregorian reflecting telescope

1-foot Gregorian reflecting telescope

English

circa 1735

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