Dr. Church's GB Patent No. 4,664 of 1822

Reported in The London Journal of Arts and Sciences

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(See Quick Note on the Complexities of Researching Old British Patents and Researching and Donwloading Old Patents for details on the sources.)

The London Journal of Arts and Sciences, [original series], Vol. 6, No. 25 (1823): 225-232 and Plate 12. and [original series], Vol. 6, No. 26 (1823): 281-285 and Plate 15. Reporting on William Church's patent No. 4664 of 1822. Google Books PDF version.

Plate 12:

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