Fitch & Anders: "Organized Elements" in Chondrites 503 



hours at 60° C. and whh 6 N HCl for 18 hours at 25° C. Treatment with 

 HF-HCl is a standard palynological technique which leaves organic materials 

 of biological origin, including various pollen grains, morphologically unaf- 

 fected.'" After this treatment only 3 per cent of the sample remained. X-ray 



Figure 4. Orgueil, rat spleen, and kimberlite stained with methyl green. (.4) Orgueil 

 methyl green stain. Many particles stain irregularly. (B) Rat spleen, methyl green stain 

 Nuclei are stained a dark green. Other tissue components do not stain. (C) Kimberlite 

 methyl green stain. Many particles stain irregularly. (D) Orgueil, methyl green stain after 

 HCIO4 treatment. Staining is as intense as before extraction. (E) Rat spleen, methyl 

 green stain after HCIO4 treatment. There is no staining of nuclei; DNA has been depoly- 

 merized and extracted. iF) Kimberlite, methyl green stain after HCIO4 treatment. Stain- 

 ing is as intense as before extraction. 



diffraction and infrared spectrophotometry indicate that this residue is mainly 

 amorphous carbon with traces of MgFo and organic matter. Microscopical 

 examination of the residue showed finely granular, black to brown material 

 virtually devoid of any structure (figure 5, C, D). Often, it was present in 

 large irregular aggregates (figure 5, B). Very rarely, spherical transparent 

 particles were seen (figure 5, A), but only 2 were found in an area where 

 several thousand organized elements should have been present. Granular 



