651 



o 

 o 



«o 



to 



K 

 •ft: 



to 



I 



16 



18 2000 22 24 26 28 3000 32 34 36 38 4000 42 

 Reciprocal wavelengths. 



Fig. I. 1. 1,3,5-Trinitrobenzene. 2. id. + KOH. 3. Picrylraethylnitrosamine. 4. id. 

 + KOH. 5. Picrylmethylacetamide. 6. id. + KOH. 7. Picric acid + KOH. 

 8. Methyl picrylmethylaminoformiate. 9. id. + KOH. 10. Ethyl picryl- 

 methylaminoformiate. 11. id. +KOH. 



