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Unmechanized Spectra Indexes

The Peek-a-boo system is easy to use in the laboratory, and has a finite number of cards, each corresponding to a specific band interval of the spectrum. A card can have as many as 10,000 holes, and the locations of the holes correspond to serial numbers of the coded spectra. For example, the card for 6.5 has holes punched to correspond to the serial numbers of all the compounds displaying an absorption band at 6.5 fi. Each of the spectral characteristics to be coded is accounted for by similar cards. [Pg.539]

One chooses the cards corresponding to the characteristics he wants to identify, places the cards in a stack above a light source, and searches for the spots of light that identify those spectra having all the characteristics in common. To produce the Termatrex cards one can obtain information from the ASTM card index. [Pg.539]


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