IOWA ACADEMY OF SCIENCES 
95 
GROWTH OP CONIFERS AT AN ALTITUDE OF 8,000 FEET, 
NORTH FORK OF HORSE CREEK. 
GROWTH OF PINUS MURRAY ANA. 
H. 
D. 
1899. 
1900. 
1901. 
1902. 
1903. 
1904. 
Age. 
14 in. 
li 
2i 
10 in. 
1 
2 
3 
/o 
2 
1 
2 
3 
3 
3 
21/2 
3 
4 
5 
6 
10 in. 
iy2 
1 
3 
9 
GROWTH OF PINUS ALBICAULIS. 
H. 
D. 
1899. 
1900. 
1901. 
1902. 
1903. 
1904. 
Age. 
19 in . 
A 
1-i 
i 
1 
2 
3 
36 in . 
1- i 
3 
2 
4 
10 
10 ft. 
2 
4 
4 
5 
8 
30 
10 
8 
6 
3 ft. 
1-14 
1 
2 
2 
4 
10 in. 
1-i 
1-i 
1 
1 
2 
6 in . 
1 
3 
6 in. 
2-i 
2-i 
2 
2 
3 
GROWTH OF ABIES SUBALPINA. 
H. 
D. 
1898. 
1899. 
1900. 
1901. 
1902. 
1903. 
1904. 
Age. 
20 ft. 
4 in. 
21/ 
23 
43 
2/ 
2/ 
5 ft. 
2 in. 
4 
6 
4 
6 
45 in. 
2 
1 
5 
4 
6 
36 in . 
^ /z 
21/ 
4 
4 
3 
2 
45 in . 
3 
2 
2 
4 
3 
4 
) Double 
45 in . 
3 
3 
1 
2 
4 
3 
) leader. 
GROWTH OF PICEA ENGELMANNII. 
