Fleets' register, and pocket almanack for the year of our Lord 1800 : Being the fourth year since the last leap year, and twenty-fourth of American independence, which began July 4th, 1776. Calculated chiefly for the use of the Commonwealth of Massachusetts, Boston, the metropolis, being in latitude 42 deg. 23 min. north, and 70 deg. 58, 53. west long. 348 miles n.e. of Philadelphia.