Argentine and Its Chaco. 413 



Cedro. — A reddish, soft wood, floats readily and is very fine 

 for interior construction of all kinds. Weight dry is about 25 

 pounds per cubic foot. 



Mora. — A yellowish wood and very hard. Does not float, 

 weighs about 75 pounds per cubic foot. As this wood has a 

 very close interwoven fibre it is especially used for cross strains 

 and compression. It is used for heavy doors, construction of 

 cars and special bridge ties. 



Quebracho Colorado: — A reddish wood, the color depending 

 on exposure, when much exposed it secretes the natural preserva- 

 tives or else they come to the surface and it changes to a blood 

 red and deep ruby. Is also hard and very rich in natural preserva- 

 tives. In this section the quebracho is not used for the extraction 

 of tannin nor for export trade, but rather for ties and wooden 

 bridge construction. Weighs from 75 to 85 pounds per cubic foot. 



Urendel. — Good for the same uses as quebracho, it being a 

 sister wood and only an expert can detect the difference. 



Lapacho. — A deep yellow green, hard wood, taking a fine pol- 

 ish. It is noted for its tensile strength and lasting qualities. I 

 have never ' seen a better heavy construction wood. It is used 

 in all better classes of construction. Weighs about 70 pounds 

 per cubic foot. 



Quina*. — This is a hard wood of reddish color and rather brittle. 

 It is used in second class construction, ranking way below la- 

 pacho. Weight 70 pounds per cubic foot. 



Cevil. — A very hard heavy wood of reddish white color, but 

 color not running true. The bark is very rich in tannin. Burns 

 with an intense heat and scarcely any smoke. It needs very 

 careful handling and drying, for it warps badly. Used on dry 

 construction, but will last about 25 years in the ground, while 

 the better class lasts 50 years easily. Weighs about 85 pounds 

 per cubic foot. 



Palo bianco. — A semi-soft, white wood. It makes a good floor- 

 ing and ceiling, being like the best spruce but heavier. 



Palo amarillo. — A hard, yellow wood, better than palo bianco 

 for construction. This does not grow to very great sizes nor 

 over two feet in diameter. 



Roble. — A wood resembling North American oak in weight and 

 color. It is not a true oak but still has the name. Entirely used 

 in furniture. 



