An account of a method of dividing astronomical and other instruments, by ocular inspection : in which the usual tools for graduating are not employed / [Edward Troughton].
- Troughton, Edward.
- Date:
- 1809
Licence: Public Domain Mark
Credit: An account of a method of dividing astronomical and other instruments, by ocular inspection : in which the usual tools for graduating are not employed / [Edward Troughton]. Source: Wellcome Collection.
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