Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
X-Ray Calculator
Perrygraf for North American PhilipsUSA
c. 1953Dia. = 16.6 cmChemistry/Physics -Spectrography

Notes: 1) Used for X-Ray fluorescenct spectrography like the Spectro-Rules above 2) Norelco X-Ray Spectrograph 3) The Norelco name was used on many products sold in the USA by Philips until 1974 4) Note the list of elements on the reverse only goes to element 98.

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