British Inch as the Unit of Measure of the Mound Builders. 59 



tration is the plan of the Hopeton works, Ross Co., Ohio; 

 situated on the east bank of the Scioto river, four miles above 

 Chillicothe, Plate 17, page 51, of Squier and Davis. 



No. I. The Hopeton Works. The great circle is 1050 feet 

 in diameter. One side of the rectangle is 900 feet in length, or 

 10800 inches. The combination with Group I is at once manifest. 

 The side of the rectangle makes a chord of the circle 530 feet 

 long. 900 less 530 is 370 feet. Five times 370 is 1850 feet, and 

 1850 less 900 feet, one side of the rectangle gives 950 feet, the 

 other side of the same. 



No. 2. The High Bank Works, on the Scioto river, five 

 miles below Chillicothe, Plate 16, p. 50. Diameter of the great 

 circle 1050 feet. This is connected with a great octagon 950 feet 

 in diameter on a measured section. 



No. 3. The Seal Township Works, near the Scioto river, in 

 Pike County, Ohio, Plate 24, p. 66. Diameter of the great circle 

 1050 feet. The great circle is connected by parallels 475 feet long 

 by 100 feet wide, to a square of 800 feet to the side. As to the 

 parallel: 475 feet is 5700 inches, and 100 feet is 1200 inches. 

 The area is 10,000 times 684 inches. 684 is but a play upon 648. 

 Reduced one-half, 684 becomes 342, which number as said is 

 remarkable in its various uses, as 243, 324, 432, and so on They 

 are all multiples of 6, as 72X6=^432. 54X6=324. 40.5X6= 

 243 and 57X6=342. 



GROUP H. B. 



Related in measure, this same number 1050 is found in the 

 following work's : 



No. I. The Cedar Bank Works, Ross County, Ohio, near 

 the Scioto river, five miles above Chillicothe; Plate 18, p. 52. 

 They consist of a great rectangle, two and opposite sides of which 

 measure, each, 1050 feet. The remaining sides measure 1400 i^&i 

 each. At the centers of the sides of 1050 feet are entrances 60 

 feet wide. In the rectangle is a truncated rectangular pyramid, 

 250 feet long, by 150 feet broad, and 4 feet high, with graded 

 ways leading on to it, 30 feet broad. Near the rectangle is an en- 

 closed rectangular parallel, 870 by 70 feet. Near by is a group 

 consisting of a square of 120 feet to the side, 9 feet high, and a 

 circle 250 feet in diameter, having an entrance 30 feet in width. 

 250 feet less 30 is 220 feet, the characteristic measure of Group 

 III. 



