Sends description and drawings of JH's actinoscope. Requests estimate for time and expense of constructing it. Questions about clock mechanism and prisms.
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Sends description and drawings of JH's actinoscope. Requests estimate for time and expense of constructing it. Questions about clock mechanism and prisms.
Papers arrived safely. Will report GD's opinion on these soon.
Sees too many difficulties in optics of JH's proposed telescope. Can build mechanical portion, but not by March as JH requires. Cannot give estimate, because design is too novel.
Regrets that GD cannot build JH's entire actinoscope. If GD can make at least mechanical components, JH will supply optics and clockwork. Can GD complete these [by end of March]? Funds are limited; please estimate cost.
Will begin building components that JH identified as most immediately needed. Confirm scale of JH's drawings. Will send samples of prism glass for JH to inspect. Cannot yet estimate cost.
Confirms scale of drawings [for JH's actinoscope]. Has found simple contrivance to replace clockwork. Will order lenses and prisms from Munich; all English glass has color aberrations.