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Prof W L Bragg Mr R W James and Mr C H Bosanquet
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abundance angle anode appear approximately atomic atomic weight beam bismuth calculated cent charge circuit compared complete considerable considered constant correction corresponding crystal curve determined direction distance effect electric electrons elements emission energy equal equation experiments expression fact field force formula frequency functions give given greater heating Hence increase indicate ionization ions iron isotopes length less light limit lines magnetic mass mean measured metals method molecules motion nature negative normal nucleus observed obtained oscillation particles period Phil physical plane plate positive possible potential present pressure probability produced range ratio rays regard relation relative represented seems shown solution species suggested suppose surface Table taken temperature theory tube unit variation wave-length wire