[LM111429] Instructions, June 14th, 1889

https://edisondigital.rutgers.edu/document/LM111429

View document with UniversalViewer   → View document on Archive.org  → Re-use this digital object via a IIIF manifest

Title

[LM111429] Instructions, June 14th, 1889

Editor's Notes

Directions For the operation of the Edison Electrolytic Meter.####[Dividing Line]####The solution is of pure zinc sulphate in water and has a density of 1.054 at 16 [degree symbol] C. That supplied with the meters may be used immediately, but if made up from the salt should be first boiled for a few minutes in order to expel dissolved atmosphere oxygen.####The plates are to be heated to 100 {degree symbol] C by immersion in boiling water and are then to be amalgamated with pure mercury while still hot, and fresh from the hot bath.####The excess of amalgam - should then be carefully removed from the surfaces of the plates with a clean brush or chamois leather, and particular attention should be given to the rivet holes in order that no loose amalgam may be left in them. The plates are then left to dry.####When quite dry the plates are weighted in a chemical balance correctly to one milligramme. After weighing they are to be riveted together inserted for the glasses and the solution poured in until it covers the plates and ascends the base of the leg surrounding the projecting wire.####The glasses are then cooked up, and the voltmeters now complete are ready for insertion in the meters under the copper clips provided for the purpose.####The current strength that these meteres are intended for must not exceed 20 amperes for regular service of four hours daily or ten amperes for continuous work.####At the close of the test, the glasses are removed from the meters, the zinc plates####[page 211]####are disconnected, carefully washed in clean water and dried. They are then weighed as before, care being taken to preserve them from the unnecessary handling.####The difference in the weights of the plates in then to be found by comparison with those taken before the test. The mean of the anode loss and cathode gain is to be taken as the indication of the voltameter in each case. This mean difference in milligrammes multiplied by the constnat 1.015 with correspond to the total number of ampere hours that the meter registers.####For Example if the cathode has gained 0.521 grammes and the anode has lost 0.516 grammes the mean 0.5185 being multiplied by 1.015 gives 0.5263 grammes or 526.3 milligrammes so that the record of the meter is 526.3 ampere hours
Supplied year, month, and day

Date

1889-06-14

Folder/Volume ID

LM111-F

Microfilm ID

109:316

Document ID

LM111429

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Download CSV | JSON