Xxv. | MAHOGANY. 177 
TABLE LXXXVIII. 
Vertical or Crushing Experiments on cubes of— 
Number 1 Inch. 2 Inches. 3 Inches. 4 Inches. 
of the 
specimen. Crushed with| Crushed with Crushed with | Crushed with 
Tons. Tons. Tons. Tons. 
13—16 2°675 II‘00 27°75 45000 
17—20 3000 11°00 27°00 45°500 
21—24 2°675 II'25 26°875 44°375 
25—28 2°875 10°75 27°875, 45°125 
Total. .| 11°225 44°00 109°500 180°500 
Average .| 2'806 II‘0o 27°375 45°125 
Do. perin.| 2°806 2°75 37042 2°820 
Nos. 29 and 30. 
Crushed with 
the weight of 
One piece, 9"°5 x 95x 15", 307 tons = 3'493 tons per square inch. 
» 95x 95x18", 336°8,, = 3°833 » oo» 
E!= 492550. S = 2105. 
THE MEXICAN MAHOGANY TREE (Szwzetenia) 
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 dimen- 
sions. 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 
N 
