German educational exhibition: World's fair, St. Louis, 1904. Scientific instruments
Printed by W. Büxenstein, 1904 - Science - 221 pages
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according accurate adjustment alternating currents amperemeter arrangement Assmann auxiliary axis balance balloon beam Berlin binding posts bolometer bridge caliper Charlottenburg circle circuit clock compass connected consists construction current and voltage curve cylinder damping determination diameter direct current distance double electric especially exhibited Franz Schmidt Friedenau furnished galvanometer gauge glass graduated horizontal induction Instrkde instrument insulation iron Jena kite lamp length light magnetic manganin manometer Manufacturer means measurements mercury metal meter method micrometer microscopes mirror Mirror Galvanometer motion movable moving coil objectives observation Observatory ohms optical pendulum photographs photometer pieces plates platinum Plug pointer Portable potentiometer Potsdam prism protected pyrometer radiation ratus reading registering apparatus Reichsanstalt Resistance Box rotation scale scientific screw shunt Siemens & Halske Sliding Contact stand standard resistances standard thermometers telescope temperature testing thermoelements tube Vacuum Vacuum tube velocity vertical voltage Voltmeter volts weight Wheatstone bridge Zeitschr