STANDARD - Survey Instrument Antique Center!

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184 The 4" Complete Transit- Theodolite No. 4b. With Yoke Standards and Wye-Bearings. Without Compass. Size as in No. 4, page 182. For triangulatioii, filling- in details, etc., in secondary triangular tioii, also for explorers, engineers and surveyors where the large instruments described under No. 11, etc., become undesirable on account of their size and weight. The Yoke Standard frame is of our advanced pattern, cast in a single piece of aluminum * (unless ordered to be of brass composition), to gain great lateral stiffness, and is leatherized. The inverting telescope can be reversed over the bearings by turning the upper covers aside, and also in the usual way through the standards. The graduation of the horizontal circle and its verniers are protected by glass. If double opposite verniers are desired for the vertical circle the figures will then run from 0-90-0 and back (as in the regular field instruments), instead of clockwise with single opposite verniers enumerated below. A level is attached to the vernier arm (instead of to the telescope as in Xo. 4). This instrument will be made with three leveling screws only and packed lying down in its carrying case. Made to order only. Complete Transit-Theodolite No. 4 b, as in cut on opposite page. SPECIFICATIONS: Horizontal circle 4-iiicli (at edge of graduation), graduated on heavy inlaid ring of solid silver, single opposite verniers read to minutes, one row of figures to 360; verniers at 90 to line of sight. Vertical circle 4-iiich, graduated on solid silver, single opposite verniers read to minutes, one row of figures 0-360 clockwise (unless ordered otherwise). Compound centers of bell metal. Telescope 7^-illch, Objects inverting, aperture l 1 ^ inch, power 18dia. in ratio 1 : 100 Stadia wires, fixed, Spirit level 2^-indl, with reversible clamp and tangent screw to vernier arm Striding" level rests at points of contact in wyes. Reading glasses to horizontal and vertical circles. Plate levels both of standard length and very sensitive. Shifting center, to set instrument exactly over a given point. Punch mark on top of telescope, to enable to center the transit from a point above. Standards leatherized (see page 9). Extension tripod. The Mahogany case has a leather strap, hooks, etc. It contains a sun-shade, a wrench a screw-driver, an adjustable plumb-bob, a magnifying glass, an adjusting pin, and weighs about 7 Ibs. Weight of transit about 5 Ibs; weight of extension tripod 9 Ibs. Gross weight of transit packed securely for shipment in two boxes, about 50 Ibs. Price of Small Complete Transit-Theodolite No. 4b, as described above and shown in cut (with extra vertical wires if desired forstellarobservation) Codeword, Gorastis. $315.OO Extras to Transit No. 4b. Compound centers made of steel running in sockets of cast iron to insure freest motion with perfect fit . . . 20.00 _ Spirit level 4-inch with reversible clamp and tangent screw to telescope (see cut No. 4.) in additions to level to vernier arm shown in the opposite cut Plain prism and colored glass ( Fig. 7, page 175) Split-leg tripod 12.OO 8.OO in addition to extension tripod (latter furnished with . transit) . "Leather cover with shoulder straps " " " " without . . Hood to protect transit from rain and dust . 16.5O 12.5O 1O.5O l.OO Bottle of watch oil .... .35 * If desired, the U-shaped standard frame can be made of brass, weighing about 1 Ib. more, no extra charge. If instrument is to be used near salt water, brass will prove more durable for this standard frame, as aluminum and its alloys are apt to be affected by salt water, saline and alkaline vapors and liquids.
No. 4b. (4 in. at edge of graduation.) 185 MERGER & SONS, Small Complete Transit- Theodolite No. 4bo For size and particulars of this instrument, as well as for extras, see opposite page Code word Gorastis. For code words for Extras and changes from Gorastis see pages F, O and H of complete code at back.) Price, as above, $315.OO Made to order only. For a transit of a similar description but with a 4^-iiieh horizontal circle, see next >Iade to order only. page,
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ENGIN. LIBRARY UC-NRLF STANDARD INS
Page 9 and 10:
PREFACE. THE instruments enumerated
Page 11 and 12:
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.
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On slightly rising ground locate fo
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(5.) Astronomical Triangle. The hei
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68 From the -(- sign of the " diffe
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70 Degree of Precision Required. (1
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72 tions for refraction, using the
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74 Correction to the Mean Refractio
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76 Table H. Coefficients showing th
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78 To Find the Meridian from " Pola
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80 REMARKS. If the instrument is no
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82 These devices are being more and
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84 c. Directions. For finding the S
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6. Directions. For reducing the nor
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88 On Stadia Measurement. Written e
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90 included between this and the ot
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92 Jug, R, of the rod AB is the dif
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94 gent screw of the main telescope
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96 zero when plates are leveled up
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i I * 2 I! all 35 e 5c u fcc - = H
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100 Berger Short Focus Lenses. A se
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102 NOTE. In selecting instruments
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RIBBING PARTS OF INSTRUMENTS. Patro
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The Berber Complete Engineers' and
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[Patented) The Berber Complete Mine
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11(5 5 O o to tO u tO CM in in in o
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118 n ai in Spirit Levels. For the
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l, 33 120
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122
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14 124 C. L,. BEKGEK & SONS. BOSTON
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1 5" AND 1 7|" C. t. BKKGER & SONS.
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C. 1-28 BEKGEU & SONS. Monitor Type
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130 The Berger 18 MONITOR TYPE WYE
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1 18 132 C. I*. BERGER & SONS, BOST
Page 140 and 141: 18 134 II ENGINEERS' WYE LEVEL. lev
Page 142 and 143: 136 18" HYDROGRAPHER'S WYE LEVEL Ha
Page 144 and 145: 138 Reversion Level. Applicable to
Page 146 and 147: 140 The Telescope will be invariabl
Page 148 and 149: 142 THE GEODETIC LEVEL. In response
Page 150 and 151: 144 COAST SURVEY PRECISE LEVEL The
Page 152 and 153: 146 PLANE TABLE This instrument, as
Page 154 and 155: 61" 150 ENGINEERS' AND SURVEYORS' T
Page 156 and 157: No. 1 a. 6 1 4 in. at edge of gradu
Page 158 and 159: No. I a. T 4 in. at edge of graduat
Page 160 and 161: No. 1 c. 154 C. L. BERGER & SO>S in
Page 162 and 163: No. 1 c, Style p. in. at edge of jr
Page 164 and 165: . 1 f. is made by C. L. Berger & So
Page 166 and 167: 160 C. L. BEKGEK & SONS. MONITOR TY
Page 168 and 169: 162 64 SURVEYORS' TRANSIT No. 1 s.
Page 170 and 171: 5^" 164 C. L. BERGER & SONS, BOSTON
Page 172 and 173: 166 C. L. BERGER & SONS. BOSTON 5|"
Page 174 and 175: 5|" 168 ENGINEERS' AND SURVEYORS' T
Page 176 and 177: The Surveyors' Solar Attachment. Pl
Page 178 and 179: 172 The Berger Solar Attachment Att
Page 180 and 181: 174 Davis' Patent Solar Attachment.
Page 182 and 183: 176 THE 5|" MOUNTAIN TRANSIT. This
Page 184 and 185: 178 The 41" Mountain and Mining: Tr
Page 186 and 187: 4|" 180 C. L,. BERGER & SONS. BOSTO
Page 188 and 189: 182 The 4" Mountain, Mining and Rec
Page 192 and 193: 186 4>4 " Complete Mine Transit No.
Page 194 and 195: ^ 188 t4 Mining Transits. All of th
Page 196 and 197: The 190 See M Fig. 1. Berger Patent
Page 198 and 199: 03 192 Complete Mining Transit No.
Page 200 and 201: |S go Complete Wet-Mine Transit No.
Page 202 and 203: 196 Different Types of Vertical Arc
Page 204 and 205: :i98 Edge G-racl nation for Vertica
Page 206 and 207: The Open-Frame Protected Vertical C
Page 208 and 209: 202 C. L. BEKGKK & SONS. Flexible J
Page 210 and 211: S fa 204 Style of trivets used with
Page 212 and 213: 200 Patented. The Lateral Adjuster
Page 214 and 215: Mining Transit. Interchangeable wit
Page 216 and 217: 210 Tunnel Transits. Xo. 1C a Tunne
Page 218 and 219: 212 Triaiigulatioii Transit- Theodo
Page 220 and 221: No. lib. 214 Complete Double Opposi
Page 222 and 223: 210 No. 11 m. 7-iiich Complete Tran
Page 224 and 225: 218 No. llg, 7-inch Complete Triang
Page 226 and 227: 220 No. 12. 8-iiich Transit for Tri
Page 228 and 229: SPECIFICATIONS : No. 15 Alt-Azimuth
Page 230 and 231: No. 15 b. Alt.-Azimuth. 224 Alt. -A
Page 232 and 233: Portable Transit Instrument for Lat
Page 234 and 235: 228 Reflecting Circle. Artificial H
Page 236 and 237: 230 Current Meters, The types of cu
Page 238 and 239: 232 Current Meters No. V and VI, As
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234 Plain Polar Plaiiimeter. This P
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236 Leveling Rods No. 145 No. 147 N
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Paine's Steel Tape Measures. & inch
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240 Surveyors' Chain Tapes. Heavy J
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2-12 Standard Steel Tape Measures.
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No. 210. Plummet Lamp. tfo. 212. 24
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246 Portable Anemometers. These ins
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PRICES SUBJECT TO CHANGE WITHOUT NO
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J Tripod Head 2 // Bolt 3 * .* Nut
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Levels, Locke's Hand Reversion Revo
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C. Li. Berger & Sons' Bevel-Limb Tr
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0) O (^ c CL 0? Z O (0 O K lu ffi C
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O CO K III III These prices do not
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ord (In whether . 4 O ~ bJD p,"* 3,
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a -iQ. Q u u o 0) o 0) U O U CO o C
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These prices do not include bag (SI
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Q III o o z o u o o U Ott bl CD O U
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o O (0 ui y O J O Q. O U 5> OC os .
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800290 I A 33012 Engineeringlibrary
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STANDARD - Survey Instrument Antique Center!

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