Wissenschaftliche Abhandlungen: Wissenschaftliche Abhandlungen

Helmholtz, Hermann

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Multivolume work

Persistent identifier:: 1788370473

Author:: Helmholtz, Hermann

Title:: Wissenschaftliche Abhandlungen

Year of publication:: 1882

Place of publication:: Leipzig; Hannover

Publisher of the original:: Johann Ambrosius Barth

Identifier (digital):: 1788370473

Language:: German

Publisher of the digital copy:: Technische Informationsbibliothek (TIB)

Document type:: Multivolume work

Volume

Persistent identifier:: 1788371100

Author:: Helmholtz, Hermann

Title:: Wissenschaftliche Abhandlungen

Sub title:: mit einem Bildniss

Scope:: XXXVIII, 654 Seiten

DOI:: 10.14463/KXP:1788371100

Year of publication:: 1895

Place of publication:: Leipzig

Publisher of the original:: Johann Ambrosius Barth

Identifier (digital):: 1788371100

Illustration:: 1 Porträt

Signature of the source:: a 2610(3)

Language:: German

Usage licence:: Public Domain Mark 1.0

Publisher of the digital copy:: Technische Informationsbibliothek (TIB)

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2022

Document type:: Volume

Collection:: Natural sciences; Physics

Chapter

Title:: CXII. On Galvanic Currents passing through a very Thin Stratum of an Electrolyte. [...]

Document type:: Multivolume work

Structure type:: Chapter

2a‘ ; FA GXIL. Pi On Galvanic Currents passing through a very Thin Stratum: of an Electrolyte. Aus: Proceedings of the Royal Society of Edinburgh. S. 596 bis 599. 1883—84. 596 AV If one closes a galvanic circuit containing a small battery, the electromotive force of which is not able to decompose: water, and a voltameter with two platinum plates dipping into. water acidulated with sulphuric acid, the current has a great intensity in the first moment, and diminishes at first very rapidly, afterwards slowly. At last its intensity approaches to zero more and more, but it never ceases completely. The more sensitive the galvanometer by which you measure its intensity, the longer is the time during which you are able to observe the deflection of the needle. If the electrolytic fluid is in contact with atmospheric air, it is easy, even with a galvanometer of simple construction and moderate sensibility, to observe that at last, a feeble residue of current remains, keeping a nearly constant intensity. This intensity, however, is increased by the slightest motion of the fluid, also by such feeble motions as are kept up by changes of temperature. Under these conditions, it is nearly impossible to determine by measurement regular relations between the electromotive force, the resistance, and the inten- sity of the current. Three years ago I had the honour to describe before the Royal Society a little apparatus, hermetically sealed and purified as much as I was able to do from all traces of oxygen and hydrogen. There I thought that the current could be really reduced to zero. But since that time I have: 41 id a AT 4 N

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