Butts, Edward,  1853-, <br/><br/>
THE CIVIL ENGINEER'S FIELD-BOOK-DESIGNED FOR THE USE OF THE LOCATING ENGINEER :  CONTAINING TABLES OF ACTUAL TANGENS AND ARCS EXPRESSED IN CHORDS OF 100 FEET FOR EVERY MINUTE OF INTERSECTION, FROM 0O TO 90O, FROM A 1O CURVE TO A 10O CURVE INCLUSIVE; ALSO TABLES OF FORMULAE APPLICABLE TO RAILROAD CURVES AND THE LOCATION OF FROGS; TOGETHER WITH RADII, LONG CHERGRADES, NATURAL TANGENTS, NATURAL SINES, NATURAL VERSED SINES, NATURAL EXTERNAL SECANTS, ETC. WITH EXPLANATORY PROBLEMS 

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<br/><br/><label>Subjects--Topical Terms: </label><br/>Ferrocarriles--Vias y desviaderos<br/>Ingenierķa de ferrocarriles--Tablas
<br/><br/><label>LC Class. No.: </label>TF216  / B8