Size of coal. 2,240 lbs. 2,000 lbs.

Lump 33.2 28.8
Broken 33.9 30.3
Egg 34.5 30.8
Stone 34.8 31.1
Chestnut 35.7 31.9
Pea 36.7 32.8


For soft coal the following measures may be taken as nearly correct;
it is simply impossible to determine any exact rule, even for
bituminous coal of the same district: Briar Hill coal, 44.8 cubic
feet per ton of 2,240 pounds; Pittsburgh, 47.8; Wilmington, Ill., 47;
Indiana block coal, 42 to 43 cubic feet.


The dimensions of the great wall of China and of what it is built.--It
runs from a point on the Gulf of Liantung, an arm of the Gulf of
Pechili in Northeastern China, westerly to the Yellow River; thence
makes a great bend to the south for nearly 100 miles, and then runs
to the northwest for several hundred miles to the Desert of Gobi. Its
length is variously estimated to be from 1,250 to 1,500 miles. For the
most of this distance it runs through a mountainous country, keeping
on the ridges, and winding over many of the highest peaks. In some
places it is only a formidable rampart, but most of the way it is
composed of lofty walls of masonry and concrete, or impacted lime and
clay, from 12 to 16 feet in thickness, and from 15 to 30 or 35 feet
in height. The top of this wall is paved for hundreds of miles, and
crowned with crenallated battlements, and towers 30 to 40 feet high.