STANDARD - Survey Instrument Antique Center!

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61" 150 ENGINEERS' AND SURVEYORS' TRANSIT. This instrument is designed for engineering work of a high class, such as is required in bridge building, water-works, and for city and land surveying. The size of the circle is such that it may be graduated to read to 30" or 20" without fatigue to the eye. The telescope is of the best definition, and has a large aperture with perfectly flat lield. The eye-piece is achromatic, and gives a large field with plenty of light. We advise our customers to order solid silver graduations for this instrument. Silvered graduations are made to order only, being of rare inquiry. Transits size No. 1 No. Ic. Specifications : Horizontal Circle 6 14 in. (edge of graduation), double opposite verniers read to minutes, two rows of figures in opposite directions from to 360, figures on limb and verniers inclined in the direction they should be read, verniers protected with fine plate glass, and provided with glass shades, graduations silvered; long compound centers with heavy flanges; edge-bar* magnetic needle 4'^ in.; spring tangent screws; fine telescope 11 1^ inches long, objects erect, aperture 1% inches, power of telescope 24 diani. (well adapted for stadia work), eye piece provided with an improved screw arrangement for accurately focussing the cross-wires, telescope perfectly balanced reverses at both ends, line of collimation correct for all distances, protection to object-slide, adjustment for vertical plane of telescope ; spirit levels of standard length, ground and extra sensitive ; shifting center to set the instrument exactly over or under a given point ; top of telescope provided with a very fine punch mark to also enable to center the transit from a point above; standards leatherized (see p. 11), full length split-leg tripod, etc. The Mahogany Case has a leather strap, hooks, etc., and contains a sun-shade, a wrench, a screw-driver, an adjustable plumb-bob, a magnifying glass, adjusting pin, and weighs from 9^ to 10 Ibs. Weight of Plain Transit No. 1 13% Ibs. " Transit with Level Attachment (No. la) 14 " " Complete Transit (No. Ib and No. Ic) . 14% " Gross Weight of <strong>Instrument</strong> complete, packed securely for shipment in two boxes, about 60 Ibs. Plain Transit, size No. 1, as described above, see cut on opposite page. Code Word, Babelle. Price (graduations silvered), $18O.OO Transit NV). la, size, etc., asunder No. 1 above, with long, sensitive lev el, clamp and tangent screw to telescope, see cut page 152. Code Word, Balnode. Price (graduations silvered), $21O.OO Transit No. 1 1>, size, etc., as under No. 1 above, but with a level, clamp and 5-inch vertical arc to telescope. Arc has double verniers reading to minutes, see cut page 153. Code Word, Besica. Price (graduations silvered), $225.OO Transit No. Ic, size, etc., as under No. 1 above, but with a level, clamp and 5-inch full vertical circle to telescope. Vertical circle has double verniers reading to minutes, and is protected by an aluminum guard, as in cut page 154. Code Word, Boscardo. Price (graduations silvered), $237OO Extras to Plain Transit No, 1 Transit No. Ic inclusive. Standards polished and lacquered (no leather finish), made to order . only $5.00 Graduation of horizontal circle, on heavy inlaid ring of solid silver . . 10.00 " reading to 30" ... . 10.00 " " " " 20" 20.00 " vertical arc or vertical circle on heavy inlaid ring of solid silver 5.00 ' Gradienter attachment (see pp. 6 and 45) . . . . . . 5.00 " Stadia Wires, fixed . . . . . . . . . . . 3.00 Short Focus Lens (pp. 101, 203). One pair ....... 16.00 Arrangement for offsetting at . . . . . . right angles 5.00 Variation plate, adapted for ah declinations E. or W. . . . . . 10.00 Cravenette hood (heavy, gives good protection); Silk (light, not waterproof) each 1.00 Bottle of fine watch-oil to lubricate the centers, etc., of transit . . . 0.35 TeleSCOpe of iy&" aperture, \\%" focal length and power of 28 1 An Inverting
No. 1. in. at edge of graduation.) 151 C. L. BERGKR & SONS. Plain Transit. For size and description of this instrument, as well as for Extras, see opposite page. Plain Transit No. 1, as shown above, and as described under Plain Transit No. 1 (Babelle), on opposite page, verniers reading to minutes, but with graduations on solid silver, as usually supplied. Code word, Babiana. Price, $19O.OO (For code words for Extras and changes from Babiana, see page C of complete code at back.) The verniers of this instrument can be placed at an angle of 90 to line of sight, if so ordered to be made specially. Sketch "A" shows the bearings in the standards for the V-shaped form of the telescope's axis, the improved manner of fitting the adjustable "Wye block in the standard by means of dovetails instead of pins, also the adjustment of the block by opposing capstan-headed nuts, securing thereby : 1. Greater rigidity of the bearing block in the standard, resulting in a truer motion of the telescope. 2. Greater ease of making the vertical plane adjustment, as compared with other makes of the same class. 3. Greater permanency of this adjustment when made. K
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ENGIN. LIBRARY UC-NRLF STANDARD INS
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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.
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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
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 122 and 123: 11(5 5 O o to tO u tO CM in in in o
Page 124 and 125: 118 n ai in Spirit Levels. For the
Page 126 and 127: l, 33 120
Page 128 and 129: 122
Page 130 and 131: 14 124 C. L,. BEKGEK & SONS. BOSTON
Page 132 and 133: 1 5" AND 1 7|" C. t. BKKGER & SONS.
Page 134 and 135: C. 1-28 BEKGEU & SONS. Monitor Type
Page 136 and 137: 130 The Berger 18 MONITOR TYPE WYE
Page 138 and 139: 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 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 190 and 191: 184 The 4" Complete Transit- Theodo
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
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:i98 Edge G-racl nation for Vertica
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The Open-Frame Protected Vertical C
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202 C. L. BEKGKK & SONS. Flexible J
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S fa 204 Style of trivets used with
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200 Patented. The Lateral Adjuster
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Mining Transit. Interchangeable wit
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210 Tunnel Transits. Xo. 1C a Tunne
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212 Triaiigulatioii Transit- Theodo
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No. lib. 214 Complete Double Opposi
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210 No. 11 m. 7-iiich Complete Tran
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218 No. llg, 7-inch Complete Triang
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220 No. 12. 8-iiich Transit for Tri
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SPECIFICATIONS : No. 15 Alt-Azimuth
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No. 15 b. Alt.-Azimuth. 224 Alt. -A
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Portable Transit Instrument for Lat
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228 Reflecting Circle. Artificial H
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230 Current Meters, The types of cu
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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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