Platinum resistance thermometry at high temperatures . 4 LEAD COMPENSATED THERMOMETER 0- MM1. 3 LEAD COMPENSATED THERMOMETER SERRATED MICA FRAME as MICA FRAME FORTHERM. || [^PORCELAINp^^TUBES i|;l STEATITE^^DISK MICA?^ PARTITION PLATINUM*--COIL STEATITE LJ U r DlbK THERM 98! 7 & 9838 5249—09 (To face page 152.) No. 1. >• Ui g cr ElErf c$> t= t HI

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