Page:Timber and Timber Trees, Native and Foreign.djvu/163

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XXII.]
LAUAN.
143

officially reported upon to the Spanish Government only a short time ago:—

Table LXVI.
Arc of flexion produced
by a constant weight
of 2,204 lbs. hung from
the centre. 		Arc at which
fracture
took place. 		Weight applied
at centre
of the arc. 		Distance between the
supporters of the wood.
Inch. Inches. lbs. Inches.
0.43 3.15 14.99 23.62 and 26.77
Table LXVII.
Weight of the
specimen. 		Resistance Maximum elasic-
ticity to be allowed
in construction
of buildings. 		Weight corre-
ponding to this
elasticity 		Strength of
Elasticity 		Resistance to tortion
co-efficient
of fracture T
To pressure Tension
of strength of
cohesion.
With the
grain of
the fibre. 		On
the Grain
perpendi-
cularly 		Absolute
strength. 		Applicable
strength.
lbs. lbs. lbs. lbs. Inch. lbs. lbs. lbs. lbs.
.948 498.24 198.41 1529.99 .038 152 99 158.16 168.43 16.84

Remarks.—Weight producing fracture at the bend, 1.32 lb. T co-efficient of fracture by bending, or of maximum bend.


Father Gaspard de St. Augustine says, in his manuscript History of the Philippine Islands, that the outside planks of the old Manilla and Acapulco galleons were of Lauan wood, and that it was chosen because it does not split with shot.

THE ACLE, No. 7 (Mimosa Acle, Juga xylocropa),[1]

is without thorns or excrescences. The Indians use it for the construction of their houses, and prize it for its good quality. In working it causes sneezing. The bark is

  1. ↑ Blanco's "Philippine Flora."
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