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I <br /> CURVE TABES. <br /> Published by=U P' L & ESSM CO. <br /> -- --- -. - _._-_ ___-- _-- Now T U'SSB vB TABLM. <br /> Table I. contains T&gents and Externals to a 1°curve. 'ran.and <br /> Nzt.toanyotherradiusmabefoundnearlyenouh,bydividingtheTan. <br /> > t.oPP=t•the girlies ural An&Is by the given degree of our re. <br /> Divio And de Tera,Deg. of Curve ha t e Central Angle asr�.Tangent: <br /> oppoite the given CoC Angle by the given.Teagsnt. <br /> — ---- ---- _ --- -- - -- _—_�_.—_-- --- To find D of C <br /> Divide Eat.o Q. �°' having-the- enttai-Angle and Eaxeraal: <br /> Ext.of twice the ven ie Angle"by the given External. <br /> posits the even Central <br /> __- — ffn�i and�Nagt:last.See.forany angle byTable I.:Tan. <br /> or be the Nat.Tan.orae.F.Y.S ceded by the radius of a 10 curare win <br /> e. <br /> EXAMPLE. <br /> Wanted a Curve with an Ext,of about 12 ft.Angle <br /> of Intersection or I. P.-�' 20' to the R., at Station <br /> 50+72. <br /> Ext.in Tab.I opposite 23.20''120,87 <br /> 120.87+12-10.07. Say a 10°Curve, <br /> Tan.in Tab.10 230201-1183_.1 <br /> Correction for A.23°20'for a 10°Cur.-0.16 <br /> 118.31-1-0.18-118.47-corrected Tangent. <br /> (If corrected Ext.is required find in same way) <br /> ��- --- Ang•23'20'-23.33 +10-2.3333-L.C. <br /> 2°19Y-def.for sta. 542 I. P.-ata. b42+7�- <br /> ,7[ 1 <br /> 404011– . a ■ a <br /> --- � ---- --- -------- — 7°19��= . � � � Tan.- 1 18.47 <br /> - <br /> B.C.-sta-.- — u , a a « <br /> 541 53541} .58' <br /> �� --- -- _ 116400- a a a �� L.C.- 2 <br /> - --- ­17�--- Z J-7 - ---- 86.86 E.C.-Sta. 5U+88.86 <br /> / -53,b3�46.47X8'(def.fbr 1 ft.of 10°Cur.)-139.41'•) <br /> 100 2"19J,-def.for sta.542. <br /> ---- - _ .J..�• _i 1 +�,.� _ _ Def.for 50 ft.-2°30 <br /> I - ------ * o 'f a 10' s Curve. <br /> . Def.for 36.88 ft.�.1 50 fora 100 Curve, <br /> 14 <br /> q ro►cw�s <br /> 100, <br /> do <br /> s <br />