200 Prof. W. H. Hobbs—The Charleston EHarthquake, 1886. 
To the present writer the data given failed to support the view of 
a gradation in intensity away from any central maximum; but 
indicate rather many strictly local maxima where the track has been 
severely wrenched, separated from each other by relatively large 
distances of damaged minima. In the following lists we have 
summarized from the report! the data collected from the damage 
observed by Mr. Sloan along each of the three railroads which cross 
the district. 
South Carolina Railway. 
Miles.? 
33. Rails bent and large displacements. Joints opened. 
5. Fish-plates torn and joints opened. 
6. Joints opened and bed depressed 6 inches. 
9. Serious flexure of the track. Train derailed. 
10. Ten Mile Hill station. Most marked development of crater- 
lets. Severe distortion of track where branch road to 
Lamb’s leaves main track. 
10%. Another severe flexure of track. Track driven longitudinally 
to the south-eastward so as to form double or S-shaped 
curve. 
11. Track parted longitudinally with gaps of 7 inches between 
rail ends. Depression of 18 inches for length of 60 feet. 
113. Opening of joints by as much as 7 mches. (From 112 to 
153 miles no sharp kinks.) A little beyond Ladson’s. 
Tracks sharply flexed with double curvature. 
18%. Another severe flexure. 
19%. Still more complex flexure, Are 500 teet further a kink in 
the track. 
20. Many serious flexures. 
21. ‘Track distorted vertically and horizontally. 
213. Summerville, numerous sharp flexures. (For next six miles 
little disturbance.) 
273. Jedburgh, severe buckling of track. 
North-Eastern Railway. 
13. Lateral flexure of rather large radius. Large track of soft 
ground moved bodily. 
4. Track makes slight curve. Noteworthy distortion. 
6. 400 feet of track depressed with a maximum of 22 inches. 
7. Track depressed over culvert, ete. 
8.  Shght flexure. 
85%. Embankment 16 feet high depressed 10 inches with indication 
of forcible vertical wrench. 
9. (Approximately.) Whole superstructure shifted 4 inches to 
the eastward. 
%. Craterlets which ejected sand 13 feet high. 
z. Fish-plates broken and rails parted 83 inches. 
4, Superstructure shifted to eastward. 
1 Loe. cit., pp. 282-306. 
2 All distances are from the Charleston terminus. 
