150 



CENTRAL SCIENTIFIC CO., CHICAGO, TJ. S. A. 



No. F163 



No. F171. No. F165. No. F173A. 



No. 2974. 



F163. CLAMP, Meter Stick. A convenient device for holding the ordinary meter stick in position on 

 a rod, with V opening for clamping it to any rod from 10 to 19 mm in diameter. The meter 

 stick is held firmly in place parallel to the rod by a thumb screw $0.55 



F165. CLAMPS, Parallel-Jawed, of brass, nickel-plated, for holding square objects, mirrors, scales, 

 screens, etc. Maximum opening of jaw, 4 cm. Bod 10 mm in diameter. 



No A B 



Eod, length, cm 10 20 



Each 1.70 1.80 



F171. CLAMP, Bight Angle, of brass, nickel-plated. To hold two 10 mm rods accurately at right angles 

 to each other 50 



F173. CLAMP, Bight Angle, of iron, neatly japanned. Size B and C have zero indicator for optical 

 bench accessories. 



No A B C D 



V opening for rods of diameter, mm 13 19 19 30 



Hole for rods of diameter, mm 10 13 6 19 



Each 50 .60 .60 1.00 



F175. CLAMP, Bight Angle, of iron, neatly japanned, with two V openings at right angles. 



No A B 



V openings for rods of diameter, mm 13 19 



Each 50 .60 



Note: For less expensive right angle clamps, see No. 2914 Clamp Holder. 

 F177. CLAMP, Bight Angle. One 19 mm V opening. Tapped ^4 -20 to receive 10 mm rod 60 



F179. CLAMP, Right Angle, for lens holders, telescope supports, pulleys, etc., with zero indicator for 

 photometer and optical bench accessories. Carefully made so that the rod will be held perpen- 

 dicular to the V. The V opening is for rods 19 mm in diameter. 



No A B 



Hole for rods of diameter, mm 10 13 



Each 60 .90 



F180. CLAMP, Bight Angle, same as No. F179A, with addition of a spring so that it can be moved 

 along the rod without loosening the set screw. Convenient for carrying photometer box. 1.50 



2974. CLAMPS, Standard, made of malleable iron, and provided with ball and socket swivel cap on screw. 



No A B C 



Opening, inches 3 4 6 



Each 70 .85 1.30 



