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Re: MEMORANDUM FROM W. F. CRONIN TO MR. KELLEHER ATKID It was pointed out to as :::: the Bureau makes this offer virtually without conditions and in this regard, he was assured that such additional personnel would be willing to work off-hours or during weekends in order to alleviate any space problem created by their presence. It was also stated that any additional equipment required by these personnel would be furnished by the FBI Laboratory and that either he or his designee would be coordinating the work of these examiners. Lastly, he was assured that any authorship of academic papers based on this work would be to their credit and that any press releases made as a result of this work would be joint releases subject to approval by both agencies. i GE «. - sponse to this was pleasant and appreciative; however, he stated that he did not perceive his work backlog to be of sufficient size to warrant the acceptance of additional personnel at this time. Upon being asked if there was any other way that | the Federal Bureau of Investigation could assist him in this case, he stated that he would be interested in any information that we could furnish regarding the further EVE characterization of the physical surface features of : textile fibers current by use of the scanning electron microscope. was assured that the appropriate inquiries wou e made promptly concerning the possibility of this technique being used and that a telephone call would be placed to him at the earliest opportunity regarding this possibility. He also asked if the FBI Laboratory was currently using any optical methods based upon the use of the interference-type microscope in the study of textile fibers. He was advised that the FBI Laboratory routinely employs conventional light microscopy, microspectrophotometry, refractive indices determination and birefringence. It was also stated that upon occasion, a dye examination by use of thin layer chromatography and chemical identification of textile fibers was confirmed by infrared spectrophotometry. At this point in the conversation, Lees carr was asked if the FBI Laboratory could be of any assistance to him in contacting industrial sources regarding developing further informat ing the fibers now in his possession. iy =: that he thought that such inquirie € premature until such time as carpets or other suspect sources of these fibers became available.