STANDARD - Survey Instrument Antique Center!

225
Portable 2" Time Transit Instrument.
As made by C. L..
Transit Instrument, as shown, has 2^" clear
aperture, by 24.45" focal length, with one Kellner
eye-piece power of 33 diameters and one large elbow
eye-piece of 30 diameters; there are 5 time wires,
spaced 20 seconds of time apart, and 2 closely
spaced horizontal wires; a reflector in the center of
telescope for illuminating the cross wires, and lard-oil
lamp is attachable to either side of standard frame.
The 6" aluminum vertical circle is graduated
on Sterling silver, has double opposite verniers reading
to minutes, with one row of figures from to
180 to for zenith distances; circle reading when
telescope points to the zenith; reading glasses are
attached, and a control level; it has a reversible
clamp and tangent.
The stride level has a value of 6 seconds of arc
for TY' run, provided with an adjustable mirror for
reading the bubble.
The standard frame is provided with two leveling
screws and one fixed point, with base plates. In-
Berger & Sons.
strument adjustable in azimuth by opposing capstan
screws on one base plate; finished in our handsome
leather finish.
The instrument is packed securely in two stout
wooden boxes, to withstand long transportation.
Weight of instrument complete, 130 pounds.
Gross weight packed for shipment, 260 pounds.
If instrument is to be used at several stations, and
it is desired to pack same to permit of ready transportation
from place to place, an extra charge for
this special packing will be made.
With rack motion for observing transit or stars,
Extra
For striding level reading to single seconds of
arc Extra
Filar micrometer, reading to single second of
arc Extra
Impersonal micrometer Extra
Prices upon application.