STANDARD - Survey Instrument Antique Center!

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 cir-
cle 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 ver-
tical 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 Instrument 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