34 LOSSES FROM CANALS BY SEEPAGE. 
PUBLICATIONS OF THE SECTION OF METEOROLOGY 
AND IRRIGATION ENGINEERING. 
BULLETINS. 
No. 13— On the Measurement and Division of Water. Oct , 1890, 46 pp. 
Some principles applicable to dividing water. Conditions to be met by 
modules. Descriptions of weirs and their conditions for accurate use; 
first English description of the Cippoletti trapezoidal weir. Tables for 
the rectangular and trapezoidal weirs, with and without contractions. 
Second edition July 1891. Editions exhnusted. 
No. 16— Artesinn Wells and Their Relation to Irrigation. 1892, 28 pp. 
Including maps showing the Denver and the San Luis basins, and indi- 
cating the probable limits of the latter, closely confirmed by the wells 
since sunk. 
Edition exhausted. 
No. 22— Preliminary Report on the Duty of Water. 1892, 32 pp. 
Giving several years measurements on the amount of water used on 
crops of alfalfa, wheat, oats, native hay, and on canals irrigating many 
thousand acres, all in the Cache a la Poudre valley, with some discus- 
sion on the absurdly high* duties sometimes reported, and on the ultimate 
duty of water. 
E lition exhausted. 
No. 27 — On the Measurement and Division of Water. 1895, 42 pp. 
Revised edition of No. 13, with additional matter, especially new tables 
computed for weirs of unit length and for depths measured in inches. 
Also tables for correcting for velocity of approach, so as to render the 
tables applicable to cases where the space in front of the weir becomes 
silted up. 
Edition exhausted. 
The tables have been reprinted in Report of the Colorado State En- 
gineer for 1895-6. 
No. 33 — Seepage or Return Waters from Irrigation. Jan. 1896, 63 pp. 
Reporting measurements in detail on the Poudre river and on the Platte 
river made to determine the increase in those streams from return waters 
from irrigation. Discusses the origin of that increase and the connec- 
tion with the area irrigated and the amount of water applied in irriga- 
tion. Shows connection between the amount and the temperature, etc. 
Copies still to be had on application. 
No. 45— Losses from Reservoirs by Seepage and Evaporation. May, 1898, 32 pp. 
Eleven years observations of evaporation at Fort Collins, and several 
years observations on floating tanks. Two winters observations on losses 
from seepage. Some discussion of economy of storage at high altitudes. 
No. 48— On the Losses from Canals from Filtration or Seepage, 
Annual Reports Forming Part of the Annual Reports of the 
Agricultural Experiment Station. 
1888 — First .\nnual Report of the Agricultural Experiment Station, 2.50 pp. C. 
L. Ingersoll director. 
Report of Meteorologist and Irrigation Engineer. 70 pp. 
Description with illustrations of instruments. 
Meteorological observations in detail. 
Table of observed sunshine by days and comparison with New York. 
Table of soil temperatures. 
( L’ables reprinted in Report of Secretary State Horticultural Society, 1889.) 
1889— Second Annual Report of the Agricultural Experiment Station, 1889, L36 
pp. C L. Ingersoll, director. 
Report of Meteorologist and Irrigation Engineer, 28 pp. 
Table of extent of irrigated area in Colorado. 
Monthly precipitation for several years and at various co-operating Btationi 
