Page:Timber and Timber Trees, Native and Foreign.djvu/197

XXV.] {| Vertical or Crushing Experiments on cubes of— of the specimen.
 * rowspan=2|Number
 * rowspan=2|Number
 * 1 Inch.
 * 2 Inches.
 * 3 Inches.
 * 4 Inches.
 * Crushed with
 * Crushed with
 * Crushed with
 * Crushed with
 * Tons.
 * Tons.
 * Tons.
 * Tons.
 * 13–16
 * 2.675
 * 11.00
 * 27.75
 * 45.000
 * 17–20
 * 3.000
 * 11.00
 * 27.00
 * 45.500
 * 21–24
 * 2.675
 * 11.25
 * 26.875
 * 44.875
 * 25–28
 * 2.875
 * 10.75
 * 27.875
 * 45.125
 * Total
 * 11.225
 * 44.00
 * 109.500
 * 180.500
 * Average
 * 2.806
 * 11.00
 * 27.375
 * 45.125
 * Do. per in.
 * 2.806
 * 2.75
 * 3.042
 * 2.820
 * }
 * 11.00
 * 27.375
 * 45.125
 * Do. per in.
 * 2.806
 * 2.75
 * 3.042
 * 2.820
 * }
 * }

Nos. 29 and 30.

Crushed with the weight of E= 492550.S = 2105.

THIE MEXICAN MAHOGANY TREE (Swietenia)

is the produce of Mexico, in Central America, where it is very abundant. It is of straight growth and outvies every other description of mahogany in its noble dimensions. It yields the timber of commerce in squares of 15 to 36 inches, by 18 to 30 feet in length. These are, however, only the ordinary lengths brought to market, the stems being generally cut into short pieces for the convenience of getting them down the hatchways of the ships, which have frequently to load in a roadstead, where it would be unsafe to open a raft-port.

Some of the trees from the district of Minatitlan must be very large, since it is no unusual thing to meet with well-squared pieces of this timber, measuring 40 to