Mr. EDAR. I have been given a piece of paper that indicates that on 	November 22, 1963, at the tower of the Texas Book Depository, they 	actually had a temperature of 68(deg) signaled at the top of Evidently 	this is backed up by some pictures. It has not been determined where       that particular temperature had been derived from or determined in order       to put it up on the tower. It also does; not take into account the       differing	temperatures that might occur at the ground level or toward       the tree area 	as opposed to next to building where temperatures could       vary. Is it your experience in situations like this that temperature       just doesn't vary much?                                                      
	    Mr. WEISS. If we are dealing with a temperature variation only 3(deg), for example, from what I have reported, the effect on the calculations would be negligible. As far as experience of temperature variations of a grassy area as opposed to a building, I have no experience there. But if we are dealing with temperature variations that are not of a large range, then the chances are it would have negligible effect. The sound goes to the building and then
	

	
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	comes away from the building again, so it is affected only as it approaches the building closely and as it leaves the building closely. Once it's out in the street, if we are out of the building range, in a normal temperature range it's going to be, in the main, near the average temperature of the area.