"Thomas Harrison and Son" . . . . . "Electronic books"@en . "The complete observator. Containing the various methods of finding the latitude when the sun is in the meridian ... And also a new method of finding the latitude, without knowing the sun's declination ... By Thomas Harrison and Son"@en . "The complete observator. Containing the various methods of finding the latitude when the sun is in the meridian ... And also a new method of finding the latitude, without knowing the sun's declination ... By Thomas Harrison and Son" . . . . . . . "The complete observator. Containing the various methods of finding the latitude when the sun is in the meridian, ... And also a new method of finding the latitude, without knowing the sun's declination, ... By Thomas Harrison and Son" . . "The complete observator. Containing the various methods of finding the latitude when the sun is in the meridian, .... And also a new method of finding the latitude, without knowing the sun's declination, ... By Thomas Harrison and Son" . . . . . "Thomas Harrison and Son (York, England)" . . "Thomas Harrison and Son (York, England)." . . .