28 BULLETIN 592, U. S. DEPARTMENT OF AGRICULTURE. 
AGRICULTURAL SURVEYING. 
(3 lessons, 6 exercises. ) 
Lesson 1.—Fundamentals of Land Measurement. 
1. Units of measurements. 
2. Use and care of instruments. 
Lesson 2.—Field Methods. 
1. Making chain survey. 
2. Leveling. 
Lesson 3.—Computing and Map Making. 
1. Making maps. 
2. Computing area. 
EXERCISE 1.—Care and Use of Chains and Tapes. 
See Agricultural Engineering, by Davidson, Chapter I. 
Exercise 2.— Making a Chain Survey. 
See above reference, Chapter IT. 
Exercise 3.— Making a Map. 
See above reference, Chapter IIT. 
ExercisE 4.— Making and Adjusting a Level. 
See above reference, Chapter VIL. 
EXERCISE 5.— Use of Homemade Level. 
See above reference, Chapter VIII. 
EXERCISE 6.— Use of Surveyor’s Level. 
See Farmers’ Bulletin 63, Exercise 33, Operation of a Level. 
FARM DRAINAGE. 
(4 lessons, 2 exercises. ) 
References.—The following department bulletins: 71, The Wet Lands of Southern 
Louisiana and Their Drainage; 190, The Drainage of Irrigated Lands; 300, Excavating 
Machinery Used in Land Drainage; 304, Land Drainage by Means of Pumps. The 
Economy of Farm Drainage, Yearbook 1915. The following Farmers’ Bulletins: | 
524, Tile Drainage on the Farm; 698, Trenching Machinery Used for the Construction - 
of Trenches for Tile Drains. 
Lesson 1.—IJmportance of Drainage. 
1. Why drainage is necessary. 
2. Relation of cost to increased value of Jand. 
3. Lands needing drainage and lands which can be drained. 
4, Kinds of drains. 
Lesson 2.—Tile Drainage. 
1. Superiority over other forms. 
2. Kinds of tile. 
3. Essentials of success in tile drains. 
4, Capacity of tile drains. 
Lesson 3.—Laying Out the Drainage System. 
1. Systems of tile drainage. 
2. Establishing grades and making maps. 
Exercise 1.— Mapping a Drainage System. 
See Farmers’ Bulletin 638, Exercise 34, Tile-ditch Profits, and 
Exercise 35, Setting Up a Gauge Line. 
