Horizontal Plate Loading test on chalk

[Buckfast]

I am trying to work out allowable bearing pressures from a plate load test, which I know is possible. The data is old (1967) and all I have is the graph attached.
Is this possible?
x-axis = settlement (inches)
y-axis = Load (tons)

 

[ishvaaag]

x axis must be far lesser units. The limit load attained is around 1 MPa, and at such compression level I see difficult say 6 inches of settlement. Ordinary plaster stands say 5 times that. So I better would think are thousandts. Anyway, no way of using data that is not clear what is. Better test again.

 

[oldestguy]

X axis in inches???

I suspect thousands of an inch.

What was the connection between surface load and plate? Wood? Steel? The elastic properties of that post? How deep into the chalk was the plate? Bottom of a drilled hole?

I'd skip the idea of using it due to too many unknowns.

If another test is to be run, you need to do at least two tests at different plate dimensions to get some idea of projecting that data to full scale footings.