.482 



MOUND EXPLORATIONS. 



As will be seeu by reference to these figures and the diagram, not 

 only is the curve irregular, but the diameters differ so much in length, 

 one being 860 feet and the other 748 feet, that the figure is much nearer 

 an ellipse than a true circle. These evidences of error in the state- 

 ments and plates of Messrs. Squier and Davis's work and manifest 

 tokens of carelessness havQ a tendency to lessen somewhat our confi- 

 dence in their statements as to measurements and dimensions, although 

 the figures of the works they personally examined are generally correct 

 as to form. 



THE SQCARK. 



This inclosure, shown in PI. xxxix, presents (juite a regular figure, 

 closely approximating a scjuare. The notes of the survey are as follows, 

 commencing at station (/, the southern corner. The stations are at the 

 intersections of the lines of the walls: 



A direct line from a to d runs N. 42° 52' W. exactly 1,100 feet. The 

 survey was, in fact, made by triangulation, the angles being as follows : 



At rt (e a 6) 88^ 38' 



Ath (a he) 90 05 



At c (ft c d) 89 47 



A.td{cde) 88 43 



Ate idea) 182 47 



The angles at a and d, using the direct line between them, are as fol- 

 lows : 



At a (da h) 90° 06' 



At d(c da) 90 02 



The following are the check lines:. 



Feet. 



Diagonal from a to c, N. 3^ 40' E 1, r)66 



Diagonal from ft to d 1, 561 



Diameter running northeast and soiitli west -1, 0SI5 



Distance between a and d 1, 102 



Diameter running northwest and southeast 1, 104 



The diameters are measured fioni tlie middle of the gateways in the 

 sides. 



