Mr. STOMBAUGH. Yes, sir. This chart shows the difference in the textile fibers when one observes them under a microscope. A cotton fiber appears to be, or rather, might be compared with an ordinary soda straw which has been flattened. You can see here that the fiber is hollow. The hollow is known as the lumen in cotton. The fiber is flattened and twisted much as teenagers do to soda straws in drug stores when they twist and crush the soda straws. Mr. EISENBERG. Pardon me, Mr. Stombaugh: this chart is a chart labeled "Textile Fibers," and having three illustrations labeled "Cotton," "Wool," and "Viscose"? Mr. STOMBAUGH. That is correct. A woolen fiber actually is a hair which originates from an animal and is composed of three basic parts, the outer part being the scales which are the rough area on the outside of the hair, the inner portion known as the cortex, and a center portion known as the medulla. Microscopically this is what you would look for to identify wool. Viscose is a synthetic fiber that is made by man. It is composed of chemicals, and is very rough around the outside area, having many striations running through it. The viscose fiber I have drawn here is what we would term a lustrous fiber. It does not have the delustering agent added to it, to cut down the luster. If this were a delustered fiber then we would have millions of small spots on the outside of this fiber which have been placed there chemically so as to cut down the luster of the fiber. Mr. EISENBERG. Was the viscose in the blanket that we have been examining lustered or delustered? Mr. STOMBAUGH. This was delustered. Mr. EISENBERG. Mr. Chairman, may I introduce the chart which the witness has been discussing as 665? This chart was prepared by you or under your supervision, Mr. Stombaugh? Mr. STOMBAUGH. It was prepared by me. The CHAIRMAN. What is the number? Mr. EISENBERG. That will be 665. (Commission Exhibit No. 665 was marked, and received in evidence.) Mr. EISENBERG. Mr. Stombaugh, did you examine this blanket to determine whether any debris was present? Mr. STOMBAUGH. Yes; I did. I scraped the blanket and removed all the foreign textile fibers and hairs and placed them into a pillbox. Mr. EISENBERG. Can you describe to us how this scraping was performed? Mr. STOMBAUGH. Yes, sir. We suspend the blanket from a rack in the laboratory, place a clean sheet of kraft paper on a table directly under it and, using a spatula, thoroughly scrape it down. This knocks all the foreign material adhering to the blanket from the blanket, and it falls down to the paper. After we have thoroughly cleaned the blanket, then we scrape up all the debris and place it in the pillboxes for a microscopic examination. Mr. EISENBERG. Why do you use this scrape method, as opposed to a fine-filter vacuum cleaner?