Identification of the British Inch as the Unit of Measure. i6i 



of the two circles and the square." (Page 83.) As to the New. 

 ark works: " Several extraordinary coincidences are exhibited be- 

 tween the details of these works and some of those already de- 

 scribed. The smaller circle F is nearly identical in size with that 

 belonging to the " Hopeton Works," and with the one attached to 

 the octagon in the High Bank group (see plates xvi. and xvii.) 

 The works last named are situated upon the Scioto, seventy miles 

 distant. The square has also the same area with the rectangle 

 belonging to the Hopeton, and with the octagon attached to the 

 High Bank works. The octagon, too, has the same area with the 

 large irregular square at Marietta. The small circles, G, G, G, be. 

 tray a coincidence with the works above mentioned, which ought 

 not to be overlooked. It is not to be supposed thai these num- 

 erous coincidences are the result of accident." (Page 71.) Soon 

 page 66 they say : "It will be remarked that we have here the 

 square, the circle and the ellipse, separate and in combination, all 

 of them constructed with geometric accuracy." 



We have still another series of measures which go far to confirm 

 the accuracy as to those given of the groups of works quoted. 

 Many of the tumuli covered altars, so called, located generally on 

 the ground level, and at the center of the mounds in which they 

 were respectively built. These altars were curiously constructed. 

 The shape was first marked out, and a portion of ground dug out to 

 the depth required. This space was filled with sand, beaten down 

 very compactly. Fire was used upon this until the substance of 

 the altar became solidified to a mass, preserving its shape and sub- 

 stance, as if a solid stone. Above this, quite often, another, and 

 sometimes a third altar was constructed, of definite regular shape, 

 followed by the same use. Over these finally the earth was heaped 

 and the mound formed. By this the altar in its integrity would be 

 preserved for any number of years. The measures of some of these 

 altars, as they are stated in the article on "Sacrificial Mounds," 

 commencing with page 144, are as follows: "No. i. A circular 

 base 9 feet, or 108 inches in diameter, diameter of top 3 feet, 

 or 36 inches, depth 9 inches. No. 2. Rectangular base 10 

 feet, or 120 inches long, 8 feet, or 96 inches broad. Top 6 

 feet, or 72 inches long, by 4 feet, or 48 inches broad, height 18 

 inches. No. 3. Square base 10 by 10 feet, top 6 by 6 feet, and 

 a circular bowl in this of 4 feet in diameter. Depth of altar 22 

 inches, sinking a foot or more below the original surface of the 

 ground. No. 4. Second and upper altar 8 feet by 8 feet," Here, 



