Reproduced from the holdings of the National Archives ~ PROBABLE ERROR COMPUTATION” Reson DISTANCE Discrepancy between 2 Measurements of Section Allow 20°dist. in Am. North Base—7A F 243.4274 B 243.4274 abre Probabie Actuol Maximum Difference m m 3 Error 0.6¢75V- 2 | Section m 20 ¥ -2434274 0.0098 0.0000 0.6745 x 0.000 0O.000/ 20 Y 6498766 0O.O0/6f 0.0074 0.6795 x 0.0037 O.0025 0.0000 7A — 20 F 6498803 B 20~— 34 B 6¢4 9.8729 — 0.0074 F 699.995/ 8 700.0026 : | : | | 20 Y.6999988 0.0/67 0.0075 0.6745 x 0.00375 O0025 CO Y .4499832 0. O/ 34. 2006 0.6745 *% 0.0008 0.0005 20 Y.580 9796 0.0/52 OOOS8 \0.6745x0.00275| 0.0019 0.0075 34B~43C F 449.9824 B 449.9840 YSAYVN 8B SSW IOH MEASURED SYASNISNS SECTION 43C — Runit F 580.9769 B 580.9824 0.0055 O.000Lr F 0.0025" 0.0025" B Z= GO0000/637 Y= 0.00405 M 5 2624.262/ 2624.2693 0.0072 M 0.000 5° 0.0019" Actual difference Probable error 0.0072 = 1:36448! 0.00905 = 1:647967 OvS'ON BOF 0.00 /6