STANDARD - Survey Instrument Antique Center!

155
Special Vertical Circle.
A 5 J-Inch Vertical Arc or Full Circle with Hal graduations of style
shown for No. 1 b and No. 1 c but reading to 3O" can be furnished in place of the
regular 5-inch. Made to order only.
Code Word Bowaiia Price, extra $5.O
Beaman Stadia Arc.
An attachment for reducing inclined stadia readings to horizontal distances, and at
the same time, giving differences of elevation between instrument and base of rod. It
can be attached to Transits with flat vertical circles
5|, 5 and 4 inches diameter and
having the verniers between the legs of standards, as in ]Vo. 1 c.
It may also be used for arcs with an open edge graduation, as for Plane Table
Alidades, etc. Attached to our instruments to order only. See page 197.
Code Word Beaman Price, extra $3O.OO
No. Ic, Style o.
The Berber Double Opposite Vernier Attachment for transits provided
with a 5-incii full vertical circle, verniers reading to minutes. For more information
and adjustments of this feature see page 49. Made to order only.
Code Word Bowek Prijce, extra $2O.O()
For price of Double Opposite Vernier Attachment with Open Frame protected
vertical circle, graduation glass-covered, see page 199.
Code Word Bowis
Reversion Level.
Applicable to any of our Transits of sizes Xo. 1,2 3, 4, 5 and 6.
Price, extra (over price of transit with level attachment to telescope), $12.OO
NOTE. This. level has a revolvable cover guard to protect the exposed side of the level and to act as a
reflector while in use.
The adjustment of this level and the horizontal cross-wire has to be made in the manner described for
the fixed level attached to the transit telescope, see pages 54 and 63.