466 



MOUND EXPLORATIONS. 



Check lines. 



Feet. 



From 3 to 4, junction with eastern parallel 268 



From 4 to .5, junction with western parallel 158 



From 5 to 6, western corner 500 



The inuer angle.s as ascertained by measurement on the ground are 

 as follows : 



At station 1 144° 30' 



At station 2 90 51 



AtstationS 8ST 40 



At station 6 90 26 



At station 7 124 34 



Supposing the obliterated parts of the lines about the southern cor- 

 ner to have been straight continuations of the remaining portions, as 

 represented in the figure, this angle would equal 89 degrees 3 minutes; 

 and the side 6 to 8 would be 939 feet; and 8 to 2 would be 951 feet. 



There are at present no indications whatever of the inner mounds 

 represented on Col. Whittlesey's plat. 



As will be seen by inspecting our figure and referring to the notes 

 of the resurvey, this inclosure varies but slightly from a true square, 

 the course of the opposite sides in one case differing but 31 minutes 

 and in the other but 6 minutes. The greatest variation at the corners 

 from a true right angle is 57 minutes. 



The length of the diagonal from station 2 to 6 is 1,307 feet, ascer- 

 tained from plat carefully drawn to a large scale. 



Fig. 316, prepared from a survey made by Mr. Henry L. Reynolds, 

 represents the irregulaiities and fall of the laud between the parallel 

 embankments of the Newark Works, Ohio, which, as will be seen in 

 PI. XXX, extend from the Square to the Octagon and from the Optagon 

 eastward to Raccoon creek. 



The difi'erence in level between the entrance of the circle marked E 

 (the Fair Ground circle) and the northwest entrance of the Square is 

 also given. 



The level of the southeast entrance of the Octagon was chosen as a 

 datum or base from which to recken the rise or fall. This datum is 

 indicated by the fine horizontal dotted line in Fig. 310. 



Beginning at the southeast entrance of the Octagon, the course 

 between the parallels, which ran S. 75° E. towards the Square, was 

 well marked for 2,500 feet, for along this entire distance the embank- 



