STANDARD - Survey Instrument Antique Center!

186
4>4 "
Complete Mine Transit No. 4k.
With Yoke Standards and Wye-Bearings. Without Compass.
For use where Transits sizes Xo. 2, 3 and 6 are considered too heavy and No. 4 anrt 4b
too light in weight.
The Transit shown in the cut on opposite page is best fitted for underground work
on account of its fully enclosed vertical circle. However, with a change from this latter
type to any of our open forms of vertical circle, such as described and illustrated
on pages 155, 159, 193 and 200, this instrument is equally well adapted for engineering
and surveying work of all kinds, and its price will be correspondingly lower.
The Yoke standard frame carrying the Wye-bearings, combined with the larger horizontal
circle, is of a type permitting of the placing of the plate levels of standard
length and character, in a manner more satisfactory than in the 4-inch Transit No. 4
described and illustrated on pages 182 and 183. This frame is of aluminum, and being
cast in a single piece, gives great lateral stiffness to the telescope and its attachments
and is leatherized or japanned as we deem it best. If desired, this frame can be fur-
nished in brass, when the weight of the instrument will be increased about one pound.
If the front plate level is desired to be in the center of the Yoke standards, as shown
in the cut of the Engineers 1
Transit No. 1m, then the height of the Yoke frame is
of the latter will be like that illustrated
thereby raised ^-inch and the external shape
in No. 4 b Transit. The telescope reverses through the standards as usual.
Instead of three level ing" screws, this instrument can have four, when a reduction
of 10.00 will be made from the price given below.
Made to order only.
Complete Mine Transit NO. 4k. As in cut, with three leveling screws.
SPECIFICATIONS :
Horizontal .circle 4%-inch (at edge of graduation), graduated on heavy inlaid ring of solid
silver; double opposite verniers read 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,
glass covered.
Vertical circle 4-inch, fully enclosed, edge graduation on solid silver, glass covered,
double opposite verniers read to minutes, figured from 0-90-0 and back.
with reflectors for horizontal and vertical circles.
Detachable reading glasses
Compound centers bell metal.
Telescope iy2 -incl\, objects inverted, aperture 1%-inch, poAver 18 dia.
Stadia wires, fixed, in ratio 1 : 100.
Spirit level 4%-inch, with clamp and tangent screw to telescope.
Plate levels of standard length and very sensitive.
Gradienter attachment.
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.
Illuminator shade.
Extension tripod.
Instrument packed to stand upright in carrying case.
The mahogany case has a leather strap, hooks, etc. It contains a sun -shade, a wrench, a screwdriver,
an adjustable plumb-bob, a magnifying glass, an adjusting pin, and weighs about 5 Ibs.
Weight of transit about 5 Ibs. ; weight of tripod about 9 Ibs,
Gross weight of transit packed securely for shipment in two boxes, about 45 Ibs.
Code word, Grallus. Price, $336.OO
This transit with an open face graduation to the vertical circle
with double opposite verniers shown on page 155, but without reading glasses,
Code word, Grumla. Price, $316.OO
Extras to Transit No. 4k.
Center of steel running in sockets of cast iron, insuring freest motion with perfect fit . . 1818.0O
Striding level resting at points of contact in wyes as in No. n (applicable only when there is
no Style I interchangeable telescope ordered for this instrument) 22.OO
Iievel and spring tangent screw to vernier frame for the control of vertical angles as in
No. 4b, in place of the level to the telescope, no extra charge.
!Level and spring tangent screw to vernier frame in addition to fixed level to telescope, 1O.OO
Solar attachment with small telescope as on page 172 but with counterpoise .... 52.OO
Prism and colored glass (only plain form, Fig. 7, page 1 75, permissible) 8.OO
Short focus lens, pages 101, 203, one
8.5O
Patent interchangeable auxiliary telescope, style I, page 189* 37 .OO
Split-leg tripod in addition to extension tripod furnished with the transit 16.5O
Bracket in box, page 203 14.0O
Trivets, page 204
....
Lateral adjuster and trivet combined for three leveling screws ; page 205 .... 36.OO
Leather cover with shoulder 13.OO
straps
' "
without " " 11.OO
Hood to protect transit from rain and dust
l.OO
Bottle of fine watch oil
35
* The post to which the auxiliary telescope attaches to the main telescope is shown in cut; but this post is
not furnished with instrument unless the interchangeable auxiliary telescope is ordered with the transit.