XXIV. | SABICU AND LIGNUM VITA. 167 
TABLE LXXXII. 
Vertical 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 3000 15°875 30°625 61°75 
17—20 3°250 16°750 36°500 63°75 
21, 22 3°125 167000 
23, 24 2°875 14°750 
Total. .| 12°25 63°375 73125 125°50 
Average .} 3'062 15°844 36°562 62°75 
Do. perin.| 3062 3°901 4°06 3°922 
E = 972320. S = 3393. 
THE LIGNUM VITZ TREE (Guaiacum) 
is found on several of the West India Islands, and in 
many other places, but the chief supplies come from 
St. Domingo and Bahama. It attains, in the former, the 
diameter of 22 inches, and some 30 to 40 feet in length ; 
but the Bahama is generally very small. 
The wood is dark brown, or rather greenish black, 
in colour, very hard, heavy, strong, and close and wiry in 
the grain ;)it is difficult to work in any fashion, but there 
is nothing equal to it for the making of sheaves for 
blocks, and when employed in this way it wears well, 
and seems almost imperishable. I have examined some 
sheaves after they had been in use for 50 to 70 years, and 
found them perfectly good, and fit for further service. 
The sap-wood is yellow in colour, 3g to 1 inch in 
thickness, and, like the sap of English Elm, is of such 
exceptionable character, that it is equally as good and * 
durable as the heart-wood. In sheave making, a belt of 
