projecting mund Blunt, Esq., manufacturer of philosophical and vernier pieces. The units of the additional scales are downward from its straight edge, to be placed against 10-32ds, 10-40ths and 10-48ths of an inch. The astronomical instruments, and First Assistant in the 10.40th inch scale… … struction of its mechanism large numbers about the charac- are a triumph in art. For such are the pecu- inch and mile; the inch in this cafe representing 4, ter of which there has long been a fierce dispute, they liarities of its construction, though simple, that it en- 40, 400, 4,000, 40,000, &c,…
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