12 A
ANALYTICAL
CHEMISTRY
MERCURIAL BAROMETERS Built For Long Service
DEPENDABLE AND ACCURATE The low cost instrument that gives laboratories accurate r e a d ings of barometric pressures and years of service is available again. No. 7 6 8 9 0 Cenco Mercurial Barometer is well known in thousands of laboratories throughout the world for dependable accuracy and long life. Accuracy is assured by an effective method of filling under vacuum, a technique developed at Cenco during 4 5 years of experience in barometer manufacture. The mercury well adjusts the level of the mercury to the fiducial point. The molded glass well admits light for clear vision and is easily closed for safe transportation of the filled barometer. Construction conforms to U. S. W e a t h e r Bureau specifications and correction chart for barometers. A thermometer graduated in C and F is mounted on the instrument. No. 76890 Cenco Mercurial Barometer — with scales ranging from 600 to 800 mm and 24.5 to 31.5 inches—verniers for reading to 0.1 mm or 0.005 inch Each $34.00 No. 76891 Cenco Mercurial Barometer, for altitudes from 1,500 up to 10,000 feet Each $41.00 No. 76892 Barometer Mounting for supporting Cenco Mercurial Barometers. Made of sheet metal finished in white lacquer to provide a light background for adjusting the zero index. Length, 373^ inches — width, 33^2 inches Each
$5.75
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CENCO CENTRAL
SCIENTIFIC
COMPANY
Scientific Apparatus • Instruments • Chemicals 1700 IRVING
NEW YORK
BOSTON
PARK
SAN FRANCISCO
ROAD, CHICAGO
NEWARK
13
LOS ANGELES
TORONTO
MONTREAL
