Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 162,259 pages of information and 244,500 images on early companies, their products and the people who designed and built them.
Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.
1874 Patent. '4219. To Louis Paschal Casella, of Holborn-bars, in the city of London, Scientific Instrument Maker, and Samuel George Denton, of the same place, Instrument Maker, in the employment of the said Louis Paschal Casella, for the invention of "an improved mercurial minimum and maximum thermometer."'[1]
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