4 Improved Lamp Chimney. CONNELLY'S LAMP CHIMNEY. needle remaining steady at 60 deg. for three minutes NOTES ON NEW DISCOVERIES AND NEW APPLI CATIONS OF SCIENCE. Interesting Experiments Upon the Auroral Current. scientific american, 1865-08-19
4 Improved Lamp Chimney. CONNELLY'S LAMP CHIMNEY. needle remaining steady at 60 deg. for three minutes NOTES ON NEW DISCOVERIES AND NEW APPLI CATIONS OF SCIENCE. Interesting Experiments Upon the Auroral Current. scientific american, 1865-08-19
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