the line 2-,-2 of Figure 1 showing a plan view of the tank and inlet of Figure 1; Figure 3 is a partial vertical section showing the upper portion of avertical separator tank having an inlet according to another embodiment of the invention; Figure 4 is a partial horizontal section taken along the line 44 of Figure 3 and showing a plan view of the inlet of Figure 4; and Figure 5 is a perspective v