Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 181
ng screws. By means ofa lens (F) the light from a narrow slit in front of the flameof an oil lamp (G) is thrown on the mirror, reflected fromit, and focussed on a graduated screen (H) placed abovethe slit. As the distance between the slit and the mirror isabout 18 inches, the smallest movement of… … Fig, 106. Sulphuric Acid of the apparatus were suspended from a metal plate whichclosed it at the top. This form is still adopted where there Chap, v.] Absolute Measure of Electricity. 163 is an arrangement for maintaining the charge of the jar con-stant, without which the observations made at…
Electricity
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
