38 
Colorado Experiment Station 
Headden^ William Parker (continued) 
35.) B. Ill, 1906. 
Alkalis in Colorado (including ni- 
trates.) B. 239, 1918. 
Arsenical poisoning of fruit trees. 
B. 131, 1908. 
Arsenical poisoning of fruit trees. 
B. 157, 1910. 
Australian saltbush, its composition 
and digestibility. Notes on Rus- 
sian thistle. B. 135, 1908. 
Best time to cut alfalfa. P. B. 13, 
1902. 
Black alkali in the San Luis Val- 
ley. B. 231, 1917. 
Chemistry section. Report of. R. 
6-31, 1893-1918. 
Colorado fodders ; an examination 
into their composition and com- 
parative value. B. 124, 1907. 
Colorado fodders. A study of com- 
parative values based on bulletin 
124. B. 125, 1907. 
Colorado hays and fodders. Alfal- 
fa, timothy^: native hay, corn, 
sorghum, salt bush. Digestion 
experiments. B. 93, 1904. 
Colorado irrigation waters and 
their changes. B. 82, 1903. 
Conclusions relative to the culture 
of sugar beets. P. B. 10, 1901. 
Destruction of concrete by alkali. 
B. 132, 1908. 
Deterioration in the quality of su- 
gar beets due to nitrates formed 
in the soil. B. 183, 1912. 
Fixation of nitrogen in some Colo- 
rado soils. B. 155, 1910. 
Fixation of nitrogen in some Colo- 
rado soils. A further study. B. 
178, 1911. 
Fixation of nitrogen in Colorado 
soils. The distribution of the ni- 
trates and their relation to the 
alkalis. B. 188, 1913. 
How can we maintain the fertility 
of our Colorado soils? B. 99, 1905. 
Irrigation waters and their effects. 
B. 83, 1903. 
Nitrates in the soil, an explanation 
of the so-called “Black alkali” or 
“Brown spots.” B. 160, 1910. 
Properties of Colorado wheat. B. 
237, 1918. 
A soil study. Part 1. The crop 
grown, sugar beets. B. 46, 1898. 
A soil study. Part 2. The crop 
grown, sugar beets. B. 58, 1900. 
A soil study. Part 3. The soil. B. 
65, 1901. 
A soil study. Part 4. The ground 
water. B. 72, 1902. 
Headden^ William Parker (continued) 
A study of alfalfa and some other 
hays. B. 39, 1897. 
A study of Colorado wheat. Part 
1. B. 208, 1915. 
A study of Colorado wheat. Part 
2. B. 217, 1916. 
A study of Colorado wheat. Part 
3. B. 219, 1916. 
A study of Colorado wheat. Part 
4. B. 244, 1918. 
A study of Colorado wheat ; a re- 
sume of bulletins 205, 208, 217, 
219, 237, and 244. B. 247, 1918. 
Sugar beets, a resume of the work 
done by the Agricultural Experi- 
, ment Station of Colorado. B. 63, 
1901. 
Waters of the Rio Grande, a con- 
tribution to the hydrology of the 
San Luis Valley, Colorado. B. 
230, 1917. 
Yellow berry in wheat. Its cause 
and prevention. B. 205, 1915. 
— and Douglass, Earl. 
Deterioration of manures under 
semi-arid conditions. B. 168, 
1910. , 
See Cooke, W. W. jt. author. B. 
42, 1898. 
Heliothis armigera. See Corn ear-worm. 
Hellebore, w'hite (Vertrum speciosum ) — 
notes. B. 71:25, 1902; B. 114:34, 
1906 ; B. 210 :45, 1915. 
value as an insecticide. B. 6 :5, 
1888. 
Hemiptera, list. B. 31, 1895. • 
Hemp, notes. B. 2 :5, 1887. 
Henbane, black (Hyoscyamus niger ) — 
poisoning. B. 211 :63, 1915. 
Herrick, Robert S. 
Horticulturist, Field, Report of. R. 
22-24, 1909-1911. 
Thinning the winesap. Winter and 
frost injuries of fruit tree. B. 
170, 1910. 
— and Bennett, E. R. 
Colorado raspberry industry. B. 
171, 1910. 
Hetcrocera, list of Colorado. B. 43:5, 
1898. 
Hierochloa borealis. See Holy grass. 
Hilaria jamesii. B. 12 :114, 1890. 
Hoehne, Las Animas County — 
precipitation. 1897-1917, B. 245 :63, 
1918. 
Hog cholera — 
cause. B. 197:3, 1914. 
control. B. 197:9, 1914. 
description. B. 197 :4, 1914. 
notes. B. 137:11, 1909. 
