Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book . ected by a copper wire, to whichconnectors are attached 2 rubber corks for electrodes 1 glass burette, graduated from 0 to 30cubic centimeters and reading in tenths of acubic centimeter 2 adjustable clamps8 inches rubber tubing2 brass connectors1 pinch cock, for use when it is used as an electrolytic cell for copper, etc. 121. Directions for Using the GasVoltameter.— (1) Attach both clamps to the stand. (2)Attach one end of the rubber tube to theglass U tube and carefully clamp it by
Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book . ected by a copper wire, to whichconnectors are attached 2 rubber corks for electrodes 1 glass burette, graduated from 0 to 30cubic centimeters and reading in tenths of acubic centimeter 2 adjustable clamps8 inches rubber tubing2 brass connectors1 pinch cock, for use when it is used as an electrolytic cell for copper, etc. 121. Directions for Using the GasVoltameter.— (1) Attach both clamps to the stand. (2)Attach one end of the rubber tube to theglass U tube and carefully clamp it by thelower clamp on to the stand. (3) Attachthe other end of the rubber tube to theburette and carefully clamp it by the upperclamp. (4) Adjust the position of bothclamps so that the* zero position of theburette is about one-half inch below thelevel of the top of the U tube. (5) Pour the acidulated water intothe mouth of the burette till the water in the U tube is about one-half inch from the top, the height of liquid in the burette should beon a level with or above the zero mark. (6) With the electrodes7. Fig. 99.—Students Sul-phuric Acid GasVoltameter. 98 PRACTICAL ELECTRICITY. inserted through the corks, place each one in position, carefully, bygiving a slight twist to the right as the cork enters. (7) The waterlevel in the U tube and burette should now be the same, or furtheradjustment must be made to attain this result. The level in theburette does not necessarily have to correspond with the zero gradua-tion, but must not be below it. (8) Unclamp the burette and holdit nearly horizontal. The liquid will not run out if the corks aretight, so that this is the air leakage test. (9) Attach the connectorsarid wires from the source of E. M. F. (which should be 2 or morevolts) having a final switch in the circuit. In electrolyzing any substance a back or contrary E. M. set up in opposition to the decomposing current, due to thechemical affinity of the substances olis-unit
Size: 1019px × 2451px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1901
