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



273 



Nos. 6480-2. 



No. 6500. 



No. 6490. 



No. 6504. 



No. 6510. 



6478. GAGE, Pressure, Standard, so-called test gage. A gage of extreme accuracy, graduated by means 

 of an open column of mercury and tested under the most severe conditions. Extremely sensi- 

 tive under all pressures and guaranteed to be absolutely correct when shipped. Eange, to 

 100 Ibs., with stopcock, and nipple for attaching hose. Entirely of brass, case nickel-plated. 

 ?U-60 



GAGE, Pressure, for gas cylinders, see Nos. 6530, 6544 and 6556. 



6480. GAGE, RAIN, similar to United States Weather Bureau type, but smaller. A zinc vessel 3 

 inches in diameter by 13 inches long, in the top of which is placed a copper cup having an 

 open top exactly 3 inches in diameter with sharp edge and projecting rim. The bottom of 

 this copper cup is open and fits in the top of a brass tube 1 inch in diameter in which the 

 amount of rain is measured. This tube is provided with an overflow opening and a wood 

 rule graduated for reading the rainfall directly to ^looth of an inch 3.50 



0482. GAGE, RAIN, United States Weather Bureau Standard, similar to No. 6480, but 8 inches in 

 diameter and 23 inches long, with both inner and outer tubes of brass. Complete with meas- 

 uring stick 10.00 



6486. GAGE, Screw Pitch, with 24 pitches, 4 to 30 threads to the inch; V thread 1.75 



6490. GAGE, Tube, of steel. For measuring the internal diameters of tubing, etc. Scale range, 1 to 15 

 mm. Graduated to I^Q mm 1.00 



6494. GAGE, VACUUM, or MANOMETER, for use with air pumps which are provided with a vi e -inch 

 opening tapped with 16 threads to the inch. Enclosed in glass tube with oxidized scale 14 em 

 long, graduated in millimeters. Filled with mercury, ready to attach to pump 7.00 



6496. GAGE, VACUUM, or MANOMETER. To be used under any bell jar which is 8 inches or more 

 high. Tube is mounted on a base with millimeter scale. Filled with mercury, ready for use. 

 1.80 



6500. GAGE, VACUUM, or MANOMETER, of glass, with stop-cock and movable mirror scale graduated 

 in millimeters for 13 cm above and below the zero line. Filled with mercury and mounted on 

 a wood support 15.00 



6504. GAGE, Vacuum. Same type and description as No. 6474. Range to 30 inches 6.00 



6506. GAGE, Combination Pressure and Vacuum, combining Xos. 6474 and 6504, showing both pressure 

 and vacuum on one dial; 3%-inch dial, in iron case with nickel trimmings 7.50 



6508. GAGE, Vacuum, Standard. Same type and description as Xo. 6478. Eange to 30 inches. 14.60 



6509. GAGE, Combination Pressure and Vacuum, Standard. Combines Nos. 6478 and 6508, showing 



both pressure and vacuum on one dial; 3%-inch dial. Entirely of brass, case nickel-plated. 

 17.75 



6510. GAGE, Vacuum, McLeod's, for measuring high vacua, for use in connection with Cenco-Xelson 



and similar high vacuum pumps. Will read to 0.001 mm. Mounted on wooden stand, with 



directions for use i 45.00 



GAGES, Wind, see Anemometers. 



