CONTENTS 



PART I. LAND SURVEYING 



PAGE 



SECTION I. THE SURVEYOR'S COMPASS 



1. The Instrument 1 



2. Adjustments of the Compass 4 



3. Keeping the Compass in Order 6 



SECTION II. THE MAGNETIC NEEDLE 7 



SECTION III. MEASUREMENT OF DISTANCE 9 



1. The Surveyor's Chain 9 



2. The Tape 10 



3. Marking Pins 11 



4. Chaining Practice 11 



5. Measuring Inaccessible Lines 15 



6. Stadia Measurement 17 



7. Units of Distance and Area 19 



SECTION IV. SURVEYING PRACTICE 19 



1. Running a Compass Line (Backsight, Picketing, 



Needle) 20 



2. Try-Lines 22 



3. Marking Lines and Corners 23 



4. Original Surveys and Resurveys 26 



5. Age of Spots or Blazes 26 



6. Notes 28 



7. Party and Cost 28 



SECTION V. COMPUTATION AND OFFICE WORK .... 31 



1. Traverse 31 



2. Area 37 



3. Plotting 40 



SECTION VI. ON THE BEARING OF LINES 43 



SECTION VII. ON OBTAINING THE MERIDIAN .... 51 

 SECTION VIII. THE UNITED STATES PUBLIC LAND 



SURVEYS . 60 



