The cognitive efficiency of 14 divers was studied during 1-hour exposure to water of 40°F (4.4°C) and 78°F (25.6°C). Reasoning ability was tested using a sentence comprehension task presented at the beginning and end of each test session. Vigilance was tested by requiring subjects to detect the onset of a faint peripheral light during the performance of a two-man pipe assembly task. Memory was tested by requiring subjects to learn a number of “facts” during the dive, with retention tested by recall and recognition on land, after a 40-min delay. Despite a mean drop in rectal temperature of 1.3°F (0.72°C), neither reasoning nor vigilance was impaired. Memory performance did deteriorate, though it is suggested that this may reflect a peripheral context-dependent memory effect. It is concluded that a well-motivated subject may be cognitively unimpaired despite a marked drop in deep body temperature.

The structure of the heptacyanovanadate(III) ion, V(CN)74-, has been shown to be a pentagonal bipyramid from a singlecrystal X-ray crystallographic study of K4V(CN)7-2H20.1,2 Although this anion had been prepared in a number of studies,3-11 its structure, frequently presumed to be octahedral,,had never been explicitly determined. The possibility of seven-coordination, however, had indeed been recognized by several groups of workers.6-11 Since this same material was 'most likely prepared by Alexander and Gray7 (although they formulated it as a hexacyanide, their analytical results are essentially perfect for K4V(CN)7-2H20) and since they reported difficulty in repeating the synthesis, a separate and detailed elaboration of the synthesis and properties of K4V-(CN)7-2H20 appears warranted. Further impetus stems from reports that anhydrous10 and monohydrated9 forms of the same material have been prepared. The V(CN)74-anion need not necessarily have the same structure in these several com-

This research was designed to assess the personality profiles associated with law enforcement officials from communities of varying size. Participants were from three separate law enforcement agencies (H=40). The agencies were selected based on their community size/type. Participants were from an urban department, a rural department or a college campus department. All participants were administered the Employee Personality Inventory (EPI) to assess their personality characteristics. Analysis revealed a significant difference among departments on three of the five personality dimensions measured by the EPI.

•b. OTHER REPORT K.OISI (Any oth»r numbat» that may be aitlftadIhl» raport) DISTRIBUTION STATEMENTThis document has been approved for public release and sale; its distribution is unlimited.

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