Every grand transverse Avenue and every principal divergent one, such as the communication from the President’s house to the Congress house, etc., are 160 feat in breadth and thus divided: 10 feet of pavement on each side 20 Feet 30 feet of gravel walk planted with trees on each side 60 80 feet in the middle for carriage way 80 --- 160 The other streets are of the following dimensions, viz.: Those leading to public buildings or markets 130 Feet Others 110-90 In order to execute the above plan, Mr. Ellicott drew a true Meridional line by celestial observation which passes through the Area intended for the Congress house; this line he crossed by another due East and West, which passes through the same Area. These lines were accurately measured and made the bases on which the whole plan was executed. He ran all the lines by a Transit Instrument and determined the Acute Angles by actual measurement, and left nothing to the uncertainty of the Compass. REFERENCES. A. The equestrian figure of George Washington, a Monument voted in 1783 by the late Continental Congress. B. An historic Column, also intended for a Mile or itinerary Column, from whose station (a mile from the Federal house), all distances of places through the Continent are to be calculated. C. A Naval itinerary Column proposed to be erected to celebrate the first rise of a Navy and to stand a ready Monument to consecrate its progress and Achievements. D. This Church is intended for National purposes, such as public prayer, thanksgivings, funeral Orations, etc., and assigned to the special use of no particular Sect or denomination, but equally open to all. It will be likewise a proper shelter for such monuments as were voted by the late Continental Congress for those heroes who fell in the cause of liberty and for such others as may hereafter be decreed by the voice of a grateful Nation. E. Five grand fountains intended with a constant spout of water. N. B. There are within the limits of the City about 25 good springs of excellent water abundantly supplied in the driest season of the year. The Squares coloured yellow, being fifteen in number, are proposed to be divided among the several States in the Union for each of them to improve, or subscribe a sum additional to the value of the land for that purpose, and the improvements round the Squares to be completed in a limited time.