angles as piver followine ss, tabyt a? t¢ angle, $ ESTA! wee E cir baiee oO yey OL : te ee 6omp n OLY enr ena e WIT oh aCe Pp Sete ou ‘ “oye oh” cgsé PO ao : la Ss énb a spSARZE A ae ay 7s fa eqn ra ns ninetna , The difference ch B ~ 7 sda 8 x : dan mee Sy rot ots $20 = ~ 52.C to each angle, from angles 4a, by 4 ‘ , ‘ o ¢ # eapplie af r > ? , ¢ » At does not diss nrh in the fourth oe lium + he seven places cf piste e? rabe required chte: Arps 7 6 tr Be? ote Sf « rn Since this sty tee e, (@ tao yg roge [+ applied 4 “ ~ ~p3‘ ts " moe te Sk: Syed rerens) ct oo logarithms used in lor sine, ° moon OY ' ig gas Pacific Southwest Region Reproduced from the holdings of the National Archives uO) a st angles, ~~ & ives