The National Air and Space Museum,Washington, D.C.

Abstract

Space technology is not only one of the major subjects of this spacious and gracious new Museum on Washington's Mall, it also contributed greatly to its record construction programme and it opening ceremony. Above all its designers hope that 85 complex audio-visual exhibits will perform faultlessly thanks to MACS, the Museum Automatic Control System. This central computer control unit, complete with its space-age back-up system, constantly monitors the performance of all moving exhibits, whether puppets, films or slides. Any fault is detected instantly and thus can be repaired quickly.     

Radiocarbon Dating and the George C. Davis Site,Texas

Abstract

Seventy-nine radiocarbon samples were assayed from the George C. Davis Site, a prehistoric Caddoan settlement in the central portion of east Texas. Statistical analysis of the dates convincingly establishes the age of the site as extending from about 780 A.C. to 1260 A.C. and enables us to place the cultural remains into three temporal periods. These dates also provide specific and useful examples for improving the application of radiocarbon dating to archaeological problems.