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ENGIN. LIBRARY UC-NRLF STANDARD INS
Page 9 and 10:
PREFACE. THE instruments enumerated
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DESCRIPTION OP THE Essential Featur
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Tangent Screws. These are made of A
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The Finish. It is a well-known fact
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11 whatever. As a rule more harm th
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13 has sufficiently developed to im
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15 ordinary instruments, but it mus
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17 frame, and apply another drop of
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19 The finer and finest classes of
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21 applied with an adjusting pin ab
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23 adjustment of the telescope in t
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25 Owing to the many improvements m
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27 Engineers 9 Instruments and Thei
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ITrfpodfead 2 // Bolt 3 // >/ Mf J
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In practice, however, many engineer
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34 The Pancratic, or Changeable Pow
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the 130 division, and moved on unti
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38 Graduation Reading to 2O". A 15
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Decimal Vernier Graduation. For rai
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HORIZONTAL CIRCLE HORIZONTAL CIRCLE
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44 line of collimation of the teles
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46 Obviously then, the number of wh
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48 Gradienter Screw Table I. Factor
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50 The subjoined table affords a re
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52 Plumbing and Centering Arrangeme
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54 To make the adjustment for Paral
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56 capstan-headed screw at left to
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58 To adjust the line of collimatio
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62 The Adjustment of the Wye Level.
Page 70 and 71: On slightly rising ground locate fo
Page 72 and 73: (5.) Astronomical Triangle. The hei
Page 74 and 75: 68 From the -(- sign of the " diffe
Page 76 and 77: 70 Degree of Precision Required. (1
Page 78 and 79: 72 tions for refraction, using the
Page 80 and 81: 74 Correction to the Mean Refractio
Page 82 and 83: 76 Table H. Coefficients showing th
Page 84 and 85: 78 To Find the Meridian from " Pola
Page 86 and 87: 80 REMARKS. If the instrument is no
Page 88 and 89: 82 These devices are being more and
Page 90 and 91: 84 c. Directions. For finding the S
Page 92 and 93: 6. Directions. For reducing the nor
Page 94 and 95: 88 On Stadia Measurement. Written e
Page 96 and 97: 90 included between this and the ot
Page 98 and 99: 92 Jug, R, of the rod AB is the dif
Page 100 and 101: 94 gent screw of the main telescope
Page 102 and 103: 96 zero when plates are leveled up
Page 104 and 105: i I * 2 I! all 35 e 5c u fcc - = H
Page 106 and 107: 100 Berger Short Focus Lenses. A se
Page 108 and 109: 102 NOTE. In selecting instruments
Page 110: RIBBING PARTS OF INSTRUMENTS. Patro
Page 115: The Berber Complete Engineers' and
Page 119: [Patented) The Berber Complete Mine
Page 123 and 124: 117
Page 125 and 126: Code word . . Oakadum. 119 Spirit-L
Page 127 and 128: 19.1 Tripods for the Engineers' and
Page 129 and 130: 123 C. I,. BKRGEK & SONS. BOSTON Ro
Page 131 and 132: H i r * 2 5 "* i H } if if IM s ! 1
Page 133 and 134: 5 S- 16-inch Inverting Telescope 12
Page 135 and 136: -inch erecting telescope 129 C. L,.
Page 137 and 138: I ft I 131 C. L. BEKGER & SONS Code
Page 139 and 140: 133 C. I* BEHGKK & SONS. BOSTON Cod
Page 141 and 142: 135 Oode Words for Wye levels. 18 i
Page 143 and 144: 3 S3- 137 C. L. BEKGEB & SONS. Code
Page 145 and 146: 139 C L. BERGER & SONS' ENGINEERS'
Page 147 and 148: M H 3 141
Page 149 and 150: 143 The Berger Geodetic Level.
Page 151 and 152: o o I 145 C. L,. BEBGEK & SONS.
Page 153 and 154: 147 C. L. BEKGEK & SONS.
Page 155 and 156: No. 1. in. at edge of graduation.)
Page 157 and 158: No. 1 b. in. at edge of graduation.
Page 159 and 160: . 1 b. In. at edge of graduation.)
Page 161 and 162: 155 Special Vertical Circle. A 5 J-
Page 163 and 164: No. 1 d. As made by C. L. Berger &
Page 165 and 166: No. 1 g. in. at edge of graduation.
Page 167 and 168: . at edge of graduation.) 1G1 C. L.
Page 169 and 170: Patented. (6J4 in. at edge of gradu
Page 171 and 172:
No. 5 1/2 . in. at edge of graduati
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167 C. L. UKlttiKK, & SONS. BOSTON
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No. 2. n. at edge of graduation) 16
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171 C. L. BERGER & SONS. Surveyors'
Page 179 and 180:
173 The Berber Solar Attachment. A.
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175 C. 1. BERGEK & SONS. Fig. 2. Fi
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C. L. BEKGEK & SONS. in. at edge of
Page 185 and 186:
No. n. at edge of graduation). 179
Page 187 and 188:
NO. iii. at edge of graduation) 181
Page 189 and 190:
No. 4 (4 in. at edge of graduation.
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No. 4b. (4 in. at edge of graduatio
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No. 4k in. at edge of graduation).
Page 195 and 196:
189 Diaphragm showing arrangement o
Page 197 and 198:
13 191 Fig. 9. Leather ease with sh
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Counterpoise. Complete Mining Trans
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11)5 Complete Wet-Mine Transit. No.
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197 Code Word Beaman. NbiiliiM.Ji P
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The Fully Enclosed Vertical Circle
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201 Stride Levels Resting on Specia
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The Berger Bracket for Transit or L
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205 Patented. The Berger Lateral Ad
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207 The Berger Tunnel Tripod Patent
Page 215 and 216:
209 Mining Transit interchangeable
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No. lOb Tunnel Transit With three l
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213 No. 11C, Complete Transit-Theod
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215 No. llf. Complete Transit- Theo
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217 No. llm. 7-inch Complete Transi
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As made l>y C. L. Berger & Sons 211
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221 No. 12. 8-inch Transit for Tria
Page 229 and 230:
223 No. 15 a. Alt.-Azimuth . Alt.-A
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225 Portable 2" Time Transit Instru
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227 Portable Astronomical Transit I
Page 235 and 236:
229 Sextant. Sextant. Radius, 7 inc
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231 Current Meter No. IV. As made b
Page 239 and 240:
For the convenience of our customer
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No. 115. Surveyors' Pocket and Mari
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Leveling- Rods The leveling' rods i
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239 Steel Tape Measures. i/2 inch w
Page 247 and 248:
241 Lucas's Improved Steel Tapes. %
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Jtfo. 195. Surveyors' Chain, 2 pole
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245 Pocket Magnifiers. No. 221 No.
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247 NEW PARTS FOR OUR TRANSITS ANI>
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249 NOTES TO THE PRECEDING LIST OF
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1 . L. BEKGEK & SONS. INDEX PAGE Ab
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Tangent Screws PAGE 7 Tape Repairer
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00 3 Q ss o: in u s!- < o cc a O CO
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III z p o o III o o CO o (0 4 a u o
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Z o ui o oo oo Z o 0)
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These prices do not include bag ($1
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O u D O ? bi O o o CO Z o ft u o tt
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o ill U QOO cb O CO III a CO U OOOO
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Ill D OO Z o 0) ft U oK III tt
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THIS BOOK IS DUE ON THE LAST DATE S
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