from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A coulometer.
from The Century Dictionary.
- noun An electrolytic cell arranged for quantitative measurement of the amount of decomposition produced by the passage through it of an electric current, and hence used as an indirect means of measuring the strength of the current.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Physics) An instrument for measuring the voltaic electricity passing through it, by its effect in decomposing water or some other chemical compound acting as an electrolyte.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun An
instrumentused to measure the quantity of electric charge.
from The American Heritage® Dictionary of the English Language, 4th Edition
Their experiment is usually performed by the. apparatus shown in figure 20, which is termed a voltameter, and consists of a glass vessel V, containing water acidulated with a little sulphuric acid to render it a better conductor, and two glass test-tubes OH inverted over two platinum strips or electrodes, which rise up from the bottom of the vessel and are connected underneath it to wires from the positive and negative poles of the battery C Z.
Never more than 128 yet detected, using a Mexican voltameter.
In the following specification the term silver voltameter means the arrangement of apparatus by means of which an electric current is passed through a solution of nitrate of silver in water.
Dr. Hammerl, of the Vienna Academy of Sciences, has made some experiments upon the disturbing influences on the correct indications of a copper voltameter.
In employing the silver voltameter to measure currents of about 1 ampere, the following arrangements should be adopted.
The discovery by Faraday of the law of electro-chemical equivalents had induced him to propose the voltameter as a measurer of electric currents, but the system proposed had not been used in the researches of any electrician, not excepting those of Faraday himself.
The tube is inserted in the medium whose temperature is to be found, and the electric resistance of the coil is measured by a differential voltameter.
[Footnote 1: According to recent experiments made by Dr. Hammerl, the density of current in a copper voltameter should be half an ampere per square inch of surface.] [Illustration: FIG 3.]
The consumption of the battery was estimated at the same time by interposing in the circuit a sulphate of copper voltameter, of which the copper plate was weighed before and after the experiment.
We have the fact that light falling on the platinum electrode of a voltameter generates a current, first observed, I think, by Sir W.R. Grove -- at any rate, it is mentioned in his "Correlation of Forces" -- extended by Becquerel and R.bert