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BERNALILLO COUNTY. 
(Area, 8,350 square miles; estimated forest area, 1,450 square miles. ) 
The Rio Grande River traverses the eastern part of Bernalillo County 
from north to south. Its principal tributaries are the Rio Galisteo 
on the east, and the Rio Jemez and Rio Puerco Rivers at the west. In 
addition to the above, there are numerous springs, and a few small 
streams of more or less permanence. The Rio Grande is the most im- 
portant valley, and includes a large area of agricultural land. Tothe 
westward of this valley the county is rolling and broken by hills and 
canyons. It has grass lands and some timber, and is well adapted for ~ 
grazing purposes. The Sandia Mountains occupy the eastern and the 
Jemez Mountains the central portions of the county. : 
Upon the mountains named above are situated most of the forests. 
About one-fourth of the forest area has good timber, and as much more 
has a promising young growth. Open forests of Yellow and White 
Pine and Red Cedar extend from the northeastern corner of the county 
westward to the Jemez River. The principal species of trees, in addi- 
tion to those named above, are Serub Uak and Pinon, the latter pre- 
dominating. 
But little change, if any, has been observed in the volume of water 
in the streams of this county; the flow is more intermittent than in 
former years, and floods have become more frequent. 
COLFAX COUNTY. 
(Area, 7,000 square miles; estimated forest area, 1,275 square miles.) 
This county is situated in the extreme northeastern corner of the 
Territory. It is bordered on the west by the Main Rocky Mountain 
range, and its surface, as a whole, is greatly varied. Mountains, single 
and in groups, hills, buttes, rolling lands, mesas, and valleys are em- 
braced within its limits. Numerous streams, the most important of 
which are the Cimarron and Canadian Rivers, traverse the region. 
This, with the fine growth of grass, makes it one of the best grazing 
‘districts of the west. 
The forest lands are situated principally in the western part of the 
county and constitute about one-fifth of the entire area. Nearly 10 
per cent. of the timber is Pine and Spruce of medium size. The re- 
mainder is mostly Aspen, Serub-Oak, Pifon, and Dwarf Cedar. Cot- 
tonwood grows along the streams. 
‘There is less water in the streams in summer than there was fifteen 
years ago. Floods and droughts have become more frequent. 
DONA ANA COUNTY. 
(Area, 10,260 square miles; estimated forest area, 75 square miles. ) 
Dona Ana is the central county of the southern tier bordering on 
Texas and Mexico. It is, in general terms, a strip of table land about 

