BEGIN	{
	    thresh = 12.5;	
	}

(! /^#/ ) {
	    newday = int($1);
	    if ( (newday != day) && (day != 0) )
	    {
		printday(day);
		n = 0;
		min = 15.0;
	    }
	    day = newday;
	    if ( $3 < thresh )
		n++;
	    if ( $3 < min )
		min = $3
	   }

END	{
	    printday(day);
	}

function printday(day)
{
	if ( n > 0 )
	    printf("Day %3d:  %d samples < %.1f volts, min = %.2f volts\n",
		   day, n, thresh, min);
}