Claus et al.: "Organized Elements" in Chondrites 603 



elements is essential if an accurate identification* of these particles is to be 

 achieved. 



A ck nowledgments 



We wish to thank the microbiologists who examined the microscopic prepara- 

 tions. Special acknowledgments are made to A. Cavaille of the Montauban 

 Museum for providing our new, Orgueil meteorite samples; to Henri Coustau 

 of SNPA in Pau for collecting the soil and rock samples and C. W. Phillips of 

 the U.S. Army Chemical Corps, Fort Detrick, Aid. for providing the airborne 

 dust samples. The pollen samples were obtained from B. Siegel of the Brook- 

 lyn Jewish Hospital in New York. We wish to thank Professor Harold C. 

 Urey of the University of California for his encouragement and continued in- 

 terest. 



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* Because of the obviously great significance of the organized elements, one must, of course, 

 be unusually careful in evaluating their true identity. Our objections to the publishing of 

 photographs of our yet unreported organized elements, taken of our preparations at our in- 

 vitation but published without our permission (.\nders and Fitch, Science, 1962, 138, 1392) 

 is based also on the fact that publishing photographs of organized elements adjacent to Recent 

 microbiological objects does not seem to facilitate identification because both types of these 

 particles are three dimensional objects. Furthermore, in a scientific report, critical or other- 

 wise, one is obliged to quote not only criticisms but also confirmations. It is important that 

 the organized elements be treated seriously and be evaluated by investigators with suthcient 

 experience in observing morphological features because, after all, the organized elements 

 could be the first tangible evidence for the existence of extraterrestrial life. 



