Announcing examinations for guard positions, grade GS-2 through GS-4, starting salary $3,255-$3,755, for duty at National Institutes of Health, Bethesda, Md., National Naval Medical Center, Bethesda, Md., Naval Ordnance Laboratory, White Oaks, Silver Spring, Md., Atomic Energy Commission, Germantown, Md., David Taylor Model Basin, Carderock, Md., Army Map Service, 6500 Brooks Lane NW., Washington, D.C., and all other Federal establishments located in Montgomery County, Md., announcement B-30-1 (1959).