[N085139], Technical Note, Francis Robbins Upton, October 13th, 1879

Item

Abstract

Geissler used until light from both oles. Hg. in Springel then turned on and allowed to run very fast. Good vacuum to stop small spark in an hour.; silica coated spiral tests, problem with MacCleod gauge; fr. 860 results of 13 Oct "Spiral covered with silica so that there was a thick coating completely hiding the form of the wire. Dead white fluffy. comenced at 5 pm very weak currents" table of results follows, fr. 861 spiral broak at leading wires was briht and seen under microscope to be covered with briht glaze

Date

1879-10-13

Decade

1870-1879

Identifier

N085139

Folder Set

N085

Title

[N085139], Technical Note, Francis Robbins Upton, October 13th, 1879

Microfilm ID

35:852

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University