Carhoniferous Formation of Pennsylvania — Wasmuth. 311 
undermined a naturally robust constitution and for several 
years past, Mr. Wright and his immediate friends became aware 
of his failing health, and that a relaxing from the great mental 
labor which he was undergoing had become imperative. Such 
a course he himself held in contemplation and it was his in- 
tention to indulge, in the near future, in a partial relaxation 
from labor. Since early in January last he had been in Balti- 
more at the Johns Hopkins university with his rock sections 
and microscopes, pursuing his investigations. Finally he had 
completed his determinations, was confident of his results and 
set out on his return home to begin the agi-eeable task of put- 
ting his data into shape for publication, when death overtook 
him so suddenly and so untimely. Taken with a severe cold on 
his journey, he reached home to survive but a few days. 
His memory is enshrined within the hearts of all who knew 
him; and to all he leaves the record and example of a noble, in- 
dustrious, well spent life. Those who were so fortunate as to 
know him well, loved him for his simplicity of character, for 
his integrity and his adherence to truth. He was the symbol 
of honesty and truth, an example of pure and virtuous con- 
duct. He sought the highest attainment in a complicated 
department of pure science and he had reached far upward to- 
ward the summit of the pathway along which he had striven. 
NOTES ON THE STRUCTURAL GEOLOGY OF THE CAR- 
BONIFEROUS FORMATION OF PENNSYLVANIA. 
By Henry A. Wasmuth, M. E. 
The second geological survey of Pennsylvania advocates the 
theory that the anthracite seams have been plicated into syncli- 
nals, anticlinals and inversions without fracture and dislocation. 
The minute local variations, or irregularities in the incline of 
the Pittsburgh coal beds are assigned to a change in the bulk of 
each coal bed, and without connection with the great system of 
anticlinal and synclinal plication of middle Pennsylvania. 
A glance at the maps of the middle and southern anthracite 
fields of Pennsylvania, constructed by the second geological 
survey of Pennsylvania will convince one, that by the horizon- 
tal mine workings (levels) on different coal seams, numerous 
