B. H. Hill, I Site levels June 1934–Dec. 1935Bert Hodge Hill

96 Readings at M as revised

C 130:24 A 128:16 1/2

D 116:36

Drawing: geometric diagram with points C, A, D, E, F, G, H, K4, K5 and angles/distances; labels: 310:24, 308.17, 296:36, 78:13 1/2, 103:44, 3 1/2, 143:16, 8:16, 51:20 1/2, 73:22 1/2, 22:2, 88:14 1/2, 161.9, 18:4 1/4, 253-22 1/2, 17:52, 235:29, 283:14, 92:21, 165:46, 345:46, 13:58 1/2, 57:38 1/2, 157:22 1/2, C, A, D, E, F, K4, K5, H, G

Readings at A & B as revised

Drawing: geometric diagram with points A, B, C, D, E, F, G, H; labels: 259:21, 79:21, 127:52, 149:10, 121:3, 123:8, 148:17, 149:21, 153.36, 329:10, 303.8, 143:45 1/2, 197.48, 17:48, 329:1, 307:54, 301.3, 308:17, 323:45 1/2, 333:36, B, A, C, D, E, F, G, H

Revised Apr 11:

Drawing: geometric diagram of triangles; labels: B, A, C, D, 110:11 1/2, 43:47 1/2, 25:53, 26:1, 105:19, 48:48, 69:40 1/2, 88:56 1/2, 21-15, 148.72, 131:20, 117.00, 27:25, 21:23

Right page

Apr. 11Solving Δ in rectangle ABCD with values as shwn foot of p. 96

ABCD. ∠ C 131:20 BC = 148.72 CD = 117 sum = 265.72 diff = 31.72 B + D = 48:40 1/2 = 24:20

Δ ABD AD (Δ ACD) 258.50 ∠ s 69:40 1/2, 88:56 1/2, 21:23

Δ ACD: CD = 117. ^m. ∠ s 25:53, 105:19, 48:48 Log 117 2.06819 S 25:53 9.64002 2.42817 S 48:48 9.87646 AC : 2.30463 = 201.66 S 105:19 9.98429 AD 2.41246 = 258.50

Δ ABC = BC = 148.72 ∠ s 43:47 1/2, 110:11 1/2, 26:1 Log 148.72 2.17237 S 43:47 1/2 9.84013 2.33224 S 110:11 1/2 9.97245 5 AC 2.30469 5 = 201.69 S 26:1 9.64210 AB = 1.97434 = 94.26 AB (Δ ABD) = 94.26 ∠ s Log: 94.26 = 1.97434 S 21:23 9.56182 2.41252 88:56 1/2 9.99993 AD 2.41245 258.50 69:40 1/2 9.97208 BD 2.38460 = 242.44