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5|" 168 ENGINEERS' AND SURVEYORS' TRANSIT. The essential features of this transit are like those enumerated under No. 1, page 150, \vith the exception of size and weight. We strongly recommend it for use where a lighter instrument is desirable for land surveying, railroad, mining and underground work, etc., of all kinds and where a graduation reading direct to single minutes and to 30" and 20" by estimation is preferred. Every part is made with great care and the aperture, focal length and power of telescope are properly related to each other and to the size of plate to make this a very compact, portable and accurate transit.* Complete Transit Size No. 2. As in cut (see opposite page), but with verniers at 30 to line of sidit (unless ordered to be at 90). Horizontal circle 5>^-inch (at edge of graduation), graduated on heavy inlaid ring of solid silver, double opposite verniers reading to minutes, two rows of figures to 360 in opposite directions; figures inclined in the direction verniers should be read; verniers at 30 to line of sight. Vertical arc 5-inch, graduated on solid silver, double verniers read to minutes. Telescope lOX-inell, Objects erect, t aperture 1# inch, -power 18 dia. Stadia wires, fixed, in ratio 1:100. Spirit level 5>-inch, with clamp and tangent screw to telescope. Plate levels of standard length and very sensitive. Magnetic needle 3%" edge-bar form having no index error. 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). Full length split-leg- 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 10 Ibs. ; weight of tripod from 9 to 9>^ Ibs. Gross weight of transit packed securely for shipment in two boxes, about 55 Ibs. Code Word Calypso. Price, $243.OO Transit No. 2 as in Calypso but without solid silver, graduations silvered. Code Word Calixa. Price, $228.OO Transit No. 2 as in Calypso but -without vertical arc ( see No, 1 a, page 152). Code Word Calamus. Price $223.OO Transit No. 2 as in Calypso but -without level, clamp, tangent screw, arc or stadia -wires to telescope (see cut Plain Transit No. 1, page 151). Code Word Caladium. Price $19O.OO Extras to Complete Transit No. 2. Standards polished and lacquered (no leather finish). Extra 95.OO 5-inch full vertical Circle*, in place of arc), graduation on solid silver, double vernier between legs of standard reading to minutes, with aluminum guard (as in cut, page 177). . . 9.0O Gradienter attachment 5.OO Offsetting arrangement Short FOCUS Lens (see pp. 101, 203). One pair Variation Plate, to set off all declinations E. or \V 5.0O 16.OO 1O.OO Cravenette hood (heavy, gives good protection); Silk (light, not waterproof), each . . 1.00 Bottle Of fine watch-oil, to lubricate the center, etc., of transit O.35 *For close stadia work, Transit telescope size No. 1, with its longer focal length and higher power, will be best suited for that purpose. But in all cases where greater lightness and portability and where only general good results in stadia work, as obtained with a less powerful telescope, will be deemed satisfactory, size No. J8 should be chosen. We cannot put a telescope of the size described under No. i upon a Transit size No. 2. t An Inverting Telescope of 1%" aperture, 1O% inches long and with a power of 22 dia. can be supplied with the above transits in place of the regular erecting one at no additional cost, but the instrument must be made to order. This telescope is particularly well adapted for stadia work.
No. 2. n. at edge of graduation) 169 C. L. BERGEK & SONS. 5-inch Complete Engineers' and <strong>Survey</strong>ors' Transit. For size, weight, particulars and extras of this instrument see opposite page. Transit Xo. 2, as already described on opppsite page Calypso and as shown above, but with verniers at 3O to line of sight (unless ordered to be at 90), graduations on solid silver, fixed stadia wires. Code word, Calypso. Price $243.OO (For code words for Extras and chauges from Calypso, see pages C, E and F of complete code at back.) NOTE If verniers are desired at 90 to line of sight, as in cut above, the instrument must be made specially, no extra charge.
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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.
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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
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 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 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
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
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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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