THE IRKIGATION AGE. 



229 



Tables. 



Fourteen tables giving the factor C for all cases of chan- 

 nels for a coefficient of roughness ; varying from 

 .008 to .050, inclusive, for channels having a hydraulic 

 radius from .01 ft. to 900.0 and for slopes varying from 

 0.1 to .000025, thus practically covering every possible 

 condition. 



Tables of square roots of numbers used for r and s. 

 Table of Hydraulic Elements of the Circle. 

 Table of Hydraulic Elements of Composite Section. 

 Table of Areas and Circumferences of Circles. 

 Table of Hydraulic Equivalents. 



Table of Weights of a Cubic Foot of Various Substances. 

 Conversion Table of United States and Metric Measures 



and Weights. 



Table of Squares, Cubes, Square Roots and Cube Roots. 

 Table of Logarithms. 

 Table of Natural Sines and Cosines. 

 Table of Natural Tangents and Cotangents. 

 Conversion Toble, millions of gallons in 24 hours in other 



units. 



Table of sizes of pipes or cylindrical conduits required for 

 the flow of given quantities of water at given veloc- 

 ities. 



Most all of these tables have been originated and 

 computed by the author and have been checked in prac- 

 tical work and found to be correct, so that the tables alone 

 will be worth many times the cost of the book. 



The price of the book has been placed as low as is 

 consistent with the superior quality of the work and it 

 may be obtained on the following terms : $2.50 a single 

 copy, cloth bound; if order is sent with a new subscrip- 

 tion to IRRIGATION AGE or a renewal subscription, the book 

 will be sent and THE IRRIGATION AGE one year for the sum 

 of $3.00. 



Postage is included in the above prices. 

 Send in your orders early, so as to receive early 

 attention. 



Send all orders and remittances to 

 Irrigation Age, 30 N. Dearborn St., Chicago. 



BARGAINS 



IN 



Genuine 

 Navajo Blankets 



We are agents for the Chimayo Reser- 

 vation Navajo Blankets and they come 

 to us direct from the Indian weaver. 



The kind that costs you $50 in Chicago 

 we will sell you for $10. We have some 

 excellent Navajo Blankets as low as $6. 



We guarantee satisfaction and will ship 

 goods subject to inspection and approval. 

 If not satisfied we will refund any 

 money paid. We refer to The First 

 National Bank of Durango as to our 

 financial responsibility. : : : : : 



CHEVEZ-SALAZAR CO. 



74 Main Avenue Hurungo, Colorado 



Mention Irrigation Age and we will prepay express charges 



RIFE RAMS 



give all the water needed for irrigation without 

 pumping expense or bothering with an engine. 

 Cost little to install nothing to operate. Raise 

 water 30 ft. for every footof fall. Land lying above 

 ditches^ watered at little or no expense. Pump au- 

 tomatically day and night, winter 

 and summer. Fully guaranteed. 



If there is a stream, pond or spring within a 

 mile, write for plans, book and trial offer, FREE 



IRIFE ENGINE CO. 



25 1 1 .Trinity It 1.1 u. NEW TURK 



TRINCHERA COLONY TRACT LANDS 



4 years ago the Townsite of -Blanca was a prairie, to- 

 day Blanca is a town of over 600 inhabitants and the 

 3rd largest town in the San Luis Valley. 



The value of lands and townsite lots will increase 

 many times in a short while. This is your chance, ex- 

 cellent farming land, water rights, close to town, from 

 $30 an acre up, HALF CASH. 



If interested and if you want reliable information 

 We investigate for you. 



Write us. 



The Milford Realty Co. 



Blanca, Colorado 



Buy Direct from Owner 



Save Commissions 



I have been a resident of the San Luis Valley for more 

 than 25 years ; I have been actively engaged in farming 

 and stock raising and knowing the value of lands I bought 

 the best that could be found in the valley and took ad- 

 vantage of being in the valley to buy cheap. I bought 

 my land cheap, and therefore can sell cheap. 



I have about 6 quarter sections which I will sell at prices ranging 

 from $30 to $40 an acre. All these lands are irrigated and have 

 perfect water rights. 



One quarter section, 2 miles from Alamosa, with perfect water 

 right, 70 acres in native hay, ditched, watered, artesian well, $30 an 

 acre, and this includes 80 shares San Luis Water,- 



If you want bargains in San Luis Valley, call or write to 



HARDIN HINES 



Alamosa, Colorado 



Edmund T, Perkins Engineering Company 



IRRIGATION AND AGRICULTURAL 



Investigations, Reports, Plans, Estimates and 

 Construction 



Financial assistance procured for projects 

 examined and approved by this company 



First National Bank Bldg., 



Chicago, III. 



When writing to advertisers please mention The Irrigation Age. 



