OHIO. 



465 



The two uumbers to each course, iu the width and height cohimus, 

 are two measurements of each wall near the ends in the direction of the 

 survey. 



The stations indicated by letters are at the intersections of the mid- 

 dle lines of the walls extended; station a is at the intersection of the 

 lines of the /t-36 and 37-6. The diameters as ascertained from the plat 

 (in all cases to the intersections) are as follows: 



From /( to 6 1, 21S 



From dtof 1, 213 



From 6 to / 1, 708 



From a to e I, 483 



Feet. 



From * to (/ 1, 219 



From / to 7i 1, 202 



From htod 1, 720 



From g to c 1, 487 



The widths of the gateways are as follows, the measurements being 

 from base to base: At «, 40 feet; at h, 23 feet; at c, 47 feet; at d, 2(> 

 feet; at e, 37 feet; at/, 12 feet; at ft, 60 feet. 



The angles at the crossings of the diagonals and diameters at the 

 center o are so nearly right angles as to be worthj^ of notice in this con- 

 nection. For instance, the angles at crossing of the diagonals 6/ and 

 dh differ but 10 minutes from true right angles, while those at the 

 crossing of the diameters ae and eg differ but 2 minutes. 



The inner angles at the intersection of the lines of the walls — that is 

 to say, the angles of the octagon — are as follows : 



At o lo5>^ 59' 



Ate 155 32 



At e 153 56 



ktg 153 35 



At b 113° 59' 



At (J 114 42 



At/ 117 12 



At A 115 05 



THE SQLARE. 



This is the smaller square inclosure on the east side of the works, 

 and iu PL xxv, "Ancient Monuments," is directly east of the pond. It 

 connects with the fair-ground circle (E on the plate) by a broken line 

 of parallels. According to Col. Wliittlesey's plat it varies considerably 

 from a true square, being distinctly narrowed on one side, but, as will 

 be seen from the notes of the resurvey, it must have been very nearly 

 square. As it is well nigh obliterated it was found impossible to trace 

 the lines throughout, hence only those xjarts are marked in the figure 

 (see PI. XXXIV) which were satisfactorily determined ; theuntraced por- 

 tions are represented by dotted lines. 



The following are the field notes of the resurvey which commenced 

 near the middle of the southeastern line of wall at 1, running thence to 

 2, and so on around, following the walls to station 7, whence, as the 

 wall was visible no farther, the close was made by running directly to 

 station 1 : 



12 ETH 30 



