This article presents analyses on psychometric properties of a recent revision of the Substance Abuse Subtle Screening Inventory (SASSI-3). Participants were 772 individuals from a range of clinical settings who were independently diagnosed according to the Diagnostic and Statistical Manual of Mental Disorders (3rd ed., rev. [DSM-III-R]; American Psychiatric Association [APA], 1987) or DSM-IV (APA, 1994) criteria regarding the presence or absence of a substance-dependence disorder. A development sample (n = 391) was used to formulate SASSI-3 decision rules that yielded 95% agreement with clinical diagnoses of substance dependence. Correspondence with the criterion variable was shown to be 97% in a cross-validation sample (n = 381) from the same clinical settings. Convergent relations were demonstrated with a variety of other indexes of substance misuse, including clinical assessments of substance abuse history, alcohol and drug-related arrests, self-reported use of illicit drugs, and other instruments designed to screen for substance misuse. Further, logistic regression analyses indicated no significant differences in the overall accuracy of the SASSI-3 as a function of respondents' demographic characteristics or clinical ratings of respondents' level of adjustment and functioning (Global Assessment of Functioning ratings; APA, 1987, 1994).

Water supplies in Death Valley National Monument and vicinity are limited to groundwater sources, almost without exception. Most streams in the desert area flow only ephemerally, typically during flash floods. Ground water supports perennial flow over a few short reaches of some streams. There are several hundred freshwater springs and seeps in the monument, but only a small percentage of these, including most of the large springs, are in areas of present or projected intensive use by man. Most springs are in mountainous areas; most visitor use of the monument is on the floor of Death Valley. Ground water underlies the entire area, but its availability and suitability for use are greatly restricted by the chemical quality and to a lesser extent by the permeability of water-bearing materials. The hydrologic system in Death Valley is probably in a steady-state condition that is, recharge and discharge are equal, and net changes in the quantity of ground water in storage are not occurring. Recharge to ground water in the valley is derived from interbasin underflow and from local precipitation. The two sources may be of the same magnitude. Ground water beneath the valley moves toward the lowest area, a 200-square-mile saltpan, much of which is underlain by rock salt and other saline minerals, probably to depths of hundreds of feet or even more than 1,000 feet. Some water discharges from the saltpan by evapotranspiration. Water beneath the valley floor, excluding the saltpan, typically contains between 3,000 and 5,000 milligrams per liter of dissolved solids. Water from most springs and seeps in the mountains contains a few hundred to several hundred milligrams per liter of dissolved solids. Water from large springs that probably discharge from interbasin flow systems typically contains between 500 and 1,000 milligrams per liter dissolved solids.

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Bis(2,4-pentanedionato)dimethyltin (IV) carbonyl were in the range recorded for model 1:1 electrolytes,15 whereas measurements on the initial solution indicated the starting material was a nonelectrolyte.Isolation of [RuCl(CO)2TDPME]PF6. A suspension of 111 mg of RuCl2(CO)TDPME and 40 mg (an excess) of NH4PF6 in 8 ml of acetone was stirred under 40 psi of CO for 4 hr. The suspension color changed from yellow to white. Water was added dropwise, yielding initially a colorless solution and then a white precipitate. The solid was collected, washed with water, and dried to yield 105 mg of white powder. The infrared spectrum contained a strong band at 835 cm-1 characteristic of PFe" as well as the two vco-

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