You can see this at play with the hot dog: the sandwich and sausage were both invented elsewhere, so to celebrate them separately as uniquely American on America's day of independence would present an empty gesture, immediately undermined by the tools used to make it.
An Ommaya reservoir is an intraventricular catheter system that can be used for the aspiration of cerebrospinal fluid or for the delivery of drugs (e.g. chemotherapy) into the cerebrospinal fluid.n Ommaya reservoir is an intraventricular catheter system that can be used for the aspiration of cerebrospinal fluid or for the delivery of drugs (e.g. chemotherapy) into the cerebrospinal fluid.
Crater Lake partially fills the collapsed caldera of the ancient Mount Mazama Volcano. The caldera is a bowl-shape depression of about 1,219 m (4,000 ft) deep. The maximum depth of Crater Lake recorded at the time of the July 2000 multibeam survey was 594 m (1,949 ft). The lake level had an elevation of 1,883 m (6,178 ft) above sea level at the time of the survey. The lake level of Crater Lake fluctuates according to the climate.