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PRICES SUBJECT TO CHANGE WITHOUT NOTICE Leveling: Head: Vertical Circle: Telescope: 248 Screws for guard. .25 .01 Gnarl (We cannot supply new object glasses and eye-pieces without having the instrument, or at least the telescope. See Note H. ) Cross and stadia -wires (see Note I. ) Cap for object glass for sizes No. 1 and 2 Transit, (11" to H" dia.) No. 4 Transit . (1J* and less dia) . 1.00 .02 Haifv .80 .02 liaise " eye-piece erecting ....... 1.20 .02 Harsh inverting ....... 1.00 .02 Helix Sunshade, for transits of our regular size and kinds give diameter where it is to fit .75 and 1.00 .04 Hoist Spirit Levels: Plate level, finely ground and graduated ...... $1.50 Mounted in its tube when latter is sent us . including registration 1.95 Standard level finely ground and graduated ..... 1.50 Telescope level finely ground and graduated ..... 3.50 Adjusting nut ........... .20 .05 Ibex Ichor .05 Ideal Mounted in its tube when latter is sent us including registration . 1.95 Ides .05 Image Mounted in its tube when latter is sent us including registration . 4.00 Imban NEW PARTS FOR WYE AND DUMPY LEVELS For illustration see page 6O. .01 Incog For prices of other parts not given here see above list of New Parts for Transits. Hood of gossamer rubber, give length of telescope over all . . Stirrup locking pin <strong>Center</strong> nut at bottom of spindle ..... Spirit level, finely ground and graduated, $4.50 Mounted in its tube when latter is sent us. 5.00 1.00 .70 .35 .05 .01 .01 .25f Jadea Jamb Javel Jetty
249 NOTES TO THE PRECEDING LIST OF ARTICLES SUPPLIED BY MAIL. A. Concerning Tangent and Leveling- Screws. Tangent and leveling screws can only be made to fit as nearly as possible without having the instrument in our shop. Both kinds are micrometer screws, made with great care and fitted to the particular instrument, and, therefore, are not interchangeable. When possible the tangent piece or bracket, or in the case of a leveling screw the whole leveling head should be sent us, so that we can fit it properly. If for instance the tangent screw sent you in the absence of the tangent piece or bracket should fit too tightly and you have nobody to fit it, then if you can wait, unscrew the tangent piece and send it to us by registered mail. Make sure to replace each small screw into its screw hole in the plate. If the screws are transposed they may project through, touching the circle and injuring it. If you have an instrument repairer in your vicinity, he can fit the screw by working it in and out in its nut with a little tallow until it works freely, then in the temperate or frigid zone the tallow must be removed from the screw and female thread by using a little benzine on a rag wrapped around a stick. When free from -tallow a little watch oil or vaseline should be applied as a lubricant. A jeweler or optician should be able to do this. Under no circumstances should, aay emery be used on one of these screws, as this would spoil it for ever. If nat successful the entire tangent piece and the screw should be sent us by registered mail, as already mentioned. A-:VOTKIK. Tripod head. When a new tripod head is required for an instrument having four leveling screws on account of its being bent, or the screw threads worn too loose, then generally a new lower foot-plate to leveling head (see list above) and a new packing piece to screw instrument to the slide board in box will be needed also. I 49-NOTEC. Tripod bolts, nuts, washers, clamps and shoes. Send us an outline sketch on paper obtained by running a sharp pointed pencil closely around the article desired. 3-NOTJ2 . Tripod legs. As the extension tripod legs and clamps vary in size and have been changed in style from those formerly supplied, it will be necessary to denote the size by sending the outline obtained as in Note C. *-;VOTKK. Glass shades, vernier glasses and shade frame. Send the broken pieces or an outline sketch as described in Note C. If the vernier glasses, etc., sent are too large a local optician may grind them to size. If too loose the frame should be narrowed at the top. 49-NOTEF. Magnetic needle. When a new needle seems to be required on account of loss of magnetism, the trouble is usually that the point of the pivot is dull and then needs to be carefully sharpened to a fine point or that the Jewel cap may have It -come rougn or rusty and needs to be polished .%. very little magnetism is required to make the needle work satisfactorily when the pivot point is sharp and the cap well polished. To preserve the sharpness of the pivot It Is necessary to use great care In lowering the needle onto the center point, since it may be dulled the first time it is used if the needle is dropped carelessly upon its pivot. 49-rvoTE G. Clamp screws to the telescope's axis. Only an ordinary regular telescope clamp screw can be supplied. All transits provided with a striding level or a solar attachment require a clamp screw especially made with head of smaller diameter to enable the passage of these features around the head of the clamp screw when the telescope is revolved on its horizontal axis. A sketch with the size and length of head is to accompany the order. 49-NOTEH. Object glass and Eye-piece. Sometimes it happens that an object glass is slightly warped by the excessive heat of summer, shown by a distortion of the image, making it impossible to obtain a sharp, well Defined image, or that the extreme cold of winter may crack the balsam (see description of the telescope page 31 N with which the lenses are cemented together, shown by numerous streaks or stars. (A few such streaks or stars are not hurtful, since they cut out only a very small amount of light.) Such an object glass should be sent to us for recementing. Then, in most cases, a new cell is also needed in which to mount it again which adds to the cost of repairing. In every permissib'e case the entire telescope should be sent us. After the object glass or telescope is returned to the sender it it neeesiary to readjust the cross wires for coiiimatlon as explained under "Adjustments" on page 54 of catalog. 49-NOTEi. Stadia wires. Stadia wires must be fitted specially to the focal length of each object glass, and therefore, we should receive the entire te.lescope If possible, or at least ihe object glaan, and it will also b well to atato whether the telescope is erect or inverting, a* otherwise w can only furnish the wires approximately correct. When a new object glass is required, now stadia wires as a rule must be supplied also.
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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
Page 31 and 32:
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
Page 58 and 59:
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
Page 76 and 77:
70 Degree of Precision Required. (1
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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
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78 To Find the Meridian from " Pola
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80 REMARKS. If the instrument is no
Page 88 and 89:
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
Page 119:
[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
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18 134 II ENGINEERS' WYE LEVEL. lev
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136 18" HYDROGRAPHER'S WYE LEVEL Ha
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138 Reversion Level. Applicable to
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140 The Telescope will be invariabl
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142 THE GEODETIC LEVEL. In response
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144 COAST SURVEY PRECISE LEVEL The
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146 PLANE TABLE This instrument, as
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61" 150 ENGINEERS' AND SURVEYORS' T
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No. 1 a. 6 1 4 in. at edge of gradu
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No. I a. T 4 in. at edge of graduat
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No. 1 c. 154 C. L. BERGER & SO>S in
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No. 1 c, Style p. in. at edge of jr
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. 1 f. is made by C. L. Berger & So
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160 C. L. BEKGEK & SONS. MONITOR TY
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162 64 SURVEYORS' TRANSIT No. 1 s.
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5^" 164 C. L. BERGER & SONS, BOSTON
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166 C. L. BERGER & SONS. BOSTON 5|"
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5|" 168 ENGINEERS' AND SURVEYORS' T
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The Surveyors' Solar Attachment. Pl
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172 The Berger Solar Attachment Att
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174 Davis' Patent Solar Attachment.
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176 THE 5|" MOUNTAIN TRANSIT. This
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178 The 41" Mountain and Mining: Tr
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4|" 180 C. L,. BERGER & SONS. BOSTO
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182 The 4" Mountain, Mining and Rec
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184 The 4" Complete Transit- Theodo
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186 4>4 " Complete Mine Transit No.
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^ 188 t4 Mining Transits. All of th
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The 190 See M Fig. 1. Berger Patent
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03 192 Complete Mining Transit No.
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|S go Complete Wet-Mine Transit No.
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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
Page 240 and 241: 234 Plain Polar Plaiiimeter. This P
Page 242 and 243: 236 Leveling Rods No. 145 No. 147 N
Page 244 and 245: Paine's Steel Tape Measures. & inch
Page 246 and 247: 240 Surveyors' Chain Tapes. Heavy J
Page 248 and 249: 2-12 Standard Steel Tape Measures.
Page 250 and 251: No. 210. Plummet Lamp. tfo. 212. 24
Page 252 and 253: 246 Portable Anemometers. These ins
Page 256 and 257: J Tripod Head 2 // Bolt 3 * .* Nut
Page 258 and 259: Levels, Locke's Hand Reversion Revo
Page 260 and 261: C. Li. Berger & Sons' Bevel-Limb Tr
Page 262 and 263: 0) O (^ c CL 0? Z O (0 O K lu ffi C
Page 264 and 265: O CO K III III These prices do not
Page 266 and 267: ord (In whether . 4 O ~ bJD p,"* 3,
Page 268 and 269: a -iQ. Q u u o 0) o 0) U O U CO o C
Page 270 and 271: These prices do not include bag (SI
Page 272 and 273: Q III o o z o u o o U Ott bl CD O U
Page 274: o O (0 ui y O J O Q. O U 5> OC os .
Page 279: 800290 I A 33012 Engineeringlibrary
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