{ LIL ] 
WAVE NUMBER (CM-!) 
2000 1500 1000 900 800 
! 1 
1 
ROEBLING, N. J. 
H 350 
H 420 
Wer 
i t | | L ! ! L L l 
5 
4 8 2 10 12 13 
WAVELENGTH (MICRONS) 
Infrared spectra or Cretaceous amber from Roebling, N.J. Types I, II and III. 
5 
ALV Ig 
XTX 
