With support provided by the LLNL Accelerator Mass Spectrometry Laboratory, the UCR Radiocarbon Laboratory continued its studies involving sample pretreatment and target preparation for both AMS radiocarbon ({sup 14}C) and radiocalcium ({sup 41}Ca) involving applications to archaeologically -- and paleoanthropologically- related samples. With regard to AMS {sup 14}C-related studies, we have extended the development of a series of procedures which have, as their initial goal, the capability to combust several hundred microgram amounts of a chemically-pretreated organic sample and convert the resultant CO{sub 2} to graphitic carbon which will consistently yield relatively high {sup 13}C{sup {minus}} ion currents and blanks which will yield, on a consistent basis, {sup 14}C count rates at or below 0.20% modern, giving an 2 sigma age limit of >50,000 yr BP.

Table 1 indicates that the stiffest line is the cryogenic vent line while the most flexible line is the 6 inch insulating vacuum line. The table also shows that the four remaining lines are roughly of the same stiffness. This follows closely with the experience of installing the U-tubes in the assembly hall. The vent line was by far the stiffest, while the other lines are comparitively more flexible. However, the value for the LAr line is misleading. It is as flexible as the other 1 1/2 x 3 lines. Using this as a basis, the collision hall connections should be slightly more stiff, but not appreciably. The vent line represents the only anticipated 'difficulty'. Provided that the building piping is constructed to reasonable tolerances, there should be no need to modify the existing U-tubes for use in the Collision hall. The analysis makes many assumptions which are not completely valid. For example, the inner line is much more flexible than the table indicates. Thus the analysis should not be taken as an absolute measure of the amount of force necessary to deflect the lines. The analysis does provide a means of comparison between individual lines and between the assembly …

Monthly report providing tabular statistical information about motor vehicle accidents in rural areas of Texas during 1991, with data broken out by various criteria including number of persons, locations, types of accidents, time of day, and other factors.

Monthly report providing tabular statistical information about motor vehicle accidents in Texas during 1991, with data broken out by various criteria including number of persons, locations, types of accidents, time of day, and other factors.