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240 Surveyors' Chain Tapes. Heavy J^-inch Steel Tapes. Graduations etched on bright raised surfaces. Graduated to single feet, end feet to tenths (one side only). No. 175. No. 17oa. 100 feet, complete with reel " 175b. 200 " " " " 175c. 500 " " " " No. 176. No. 176a. 100 feet, complete with reel " 176b. 200 " " " ' 4 176c. 6QP " * " . $7.50 10.50 21.50 $7.50 10.60 21.50
241 Lucas's Improved Steel Tapes. % incli wide. All tapes of this manufacture are made from the best quality of clock-spring steel, one-fourth of an inch wide, and of thickness best adapted to strength and flexibility, tempered straight, and graduated under tension, being drawn on steel bars made to correspond with U.S. standard, and are guaranteed to be as accurate as any tapes made in this country. The graduations are made each five feet or links, according to the style of tape, by brass or german silver bands firmly soldered to the tape, and marked each side with plain figures in such a manner as to be conveniently read from either end without liability of error in count. The intermediate points of feet or links are marked by a small brass rivet through the tape, with raised head on each side so as to be easily seen. Each end foot on Engineers' tapes is graduated to tenths of a foot. The adjustments for taking measure are so arranged that no difference is made by the use of large or small marking pins, the measurement being made and taken from the same side of the pin. Soldering of the number bands secures them from peeling up or rusting underneath. The method of numbering avoids the necessity of changing ends of tape, it works same with either end forward. No. 178 D. 100 feet, Engineer's, graduated to feet, each five feet by soldered bands marked with figures, end leet to tenths of a foot $4 00 No. 178 K. 66 feet, Surveyor's, graduated to links, with figured bands every five links 3.50 Metal Reel, $2. 00 extra. Ring handles included in price of tape. Tension and Temperature sent with each tape when sold Roe's Steel Tapes on Brass Reel. \i inch wide. These tapes are made of superior steel, % inch wide, graduated every foot by a brass rivet, end feet in tenths. Every five feet has a brass plate with the numbers, and every ten feet has a copper plate with numbers. They are graduated from a standard tape certified to by an official of the U. S. Coast Survey Department as correct at a temperature of 62 F. No. 179 1 A. 100 feet long, graduated every foot, end feet in . tenths, $5.00 " " " " " " " " " . 4.00 7A. 50 Prices above include a Patent Brass Reel and pair of Patent Brass Detachable Handles. Brass Reel, without Tape, SI. 50 Detachable Handles, per pair, 0.30 Tape Repairer No. 179 P. Tape Repairer 1000 Eyelets Complete Outfi; (postage $2.75 1.25 17 cents extra) 4.00 NOTE. This repairer cuts a clean hole one-sixteenth of an inch in diameter through two thicknesses of the ordinary engineer's tapes, such as Lufkin's, Chesterman's, etc. No filing is required except to round the rough corners of the break. Place the tape on the rubber pad and punch the hole in the required place. Next place an eyelet on the pivot provided for it, insert it in the hole and rivet it. The first rivet holds the tape in position for cutting and riveting the rest. Repairs ran. be made quickly, without any danger of splitting the tape, thus avoiding any chance of dirt collecting under the splices, of cutting the fingers when drawing the tape through the hands, or catching in rags, etc., when cleaning.
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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
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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
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
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 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 254 and 255: PRICES SUBJECT TO CHANGE WITHOUT NO
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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