A triplet of inventions, consisting of ... a nocturnal or diurnal telegraph ; a proposal for an universal character ; and a scheme for facilitating the progress of science, exemplified in the osteological part of anatomy / [Thomas Northmore].

  • Thomas Northmore
Date:
[1796]
Catalogue details

Licence: Public Domain Mark

Credit: A triplet of inventions, consisting of ... a nocturnal or diurnal telegraph ; a proposal for an universal character ; and a scheme for facilitating the progress of science, exemplified in the osteological part of anatomy / [Thomas Northmore]. Source: Wellcome Collection.

    15/44 page 11
    [ *1 ] For a Nocturnal Telegraph, let there be four large concave reflecting lamps, each containing the greateft quantity of light poftible; let them be placed on the top of an obfervatory, parallel to the horizon, and lying on the fame plane. Let each of thefe lamps be capable, by means of a winch, either of elevation or deprelTion to a certain degree. By elevating or deprefling one or two of them a great variety of arrange¬ ments will be produced, as the annexed fcheme will explain, taking care that each lamp be reftored to its place after every arrangement. In the firft and laft obfer¬ vatory there need only be a fet of Jingle lamps, but in the others each muft be double> fo as to face both the preceding and fubfequent obfervatory; and every obfer¬ vatory fhould be furnifhed with two tele- fcopes. The proper diameter of the lamps, and their diftance from each other, cannot be afcertained but by experience, and will vary according to the diftance of the ob¬ fervatory.
    digitised image 1
    digitised image 2
    digitised image 3