Find a particular point on a curve

Here is a sample of my data:

time                   temperature
40717.0140390	37.5
40717.0140510	37.5

40717.0519790	37.6
40717.0520020	37.6
40717.0520140	37.6

So your starting temp is different than your ending temp. How do you  
want that handled? And do you want to set a minimum value for  
"baseline" to establish what should be the starting and ending times?

David Winsemius, MD
West Hartford, CT