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ITEM — unspecified: Box 5, folder 20 Identifier: hsi00001

Articles and pamphlets, 1858-1860, undated, 1858-1860 Digital

Scope and Contents

Contains copies of Alvan Clark's (1804-1887) New double stars (1858) and New micrometer for measuring large distances (1860); Richard F. Bond's Description of Bond's isodynamic escapement, for astronomical clocks (1860); an 1883 announcement from the Harvard College Observatory on the time change; and an undated brochure on Invar, a patented alloy of nickel-steel, issued by J.H. Agar Baugh, sole agent.


  • 1858-1860

Researcher Access

Appointment necessary to consult collection. Please contact for further information.


5.5 linear feet (6 document boxes, 9 flat boxes, 4 portfolio folders)

Repository Details

Part of the Collection of Historical Scientific Instruments, Harvard University Repository

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