Page:Memoirs of a Trait in the Character of George III.djvu/243

186 2ndly. That during thirteen other days in each month, it is impracticable to ascertain it by this method with any instruments hitherto contrived, or which the nature of the service to be performed seems to admit of.

And 3rdly. That during the remaining eleven days in each month, when the Sun and Moon may, if the weather is clear be observed at the same time, no reliance can safely be placed upon the best instruments in the hand of the best observer for ascertaining the Longitude within the limits of the Act of Queen Anne; and consequently, that how valuable soever the Lunar tables may be for correcting a long dead reckoning, and thereby telling us whereabouts we are, when we are not afraid of falling in with the land, yet even during these eleven days, they do not extend to the security of ships near the shore.