Here are readings on the diode mode vs ground of each pin. I've done it clockwise and started where the dot is on the top of the IC from left to right. 

1. 0.718mV
2. OL
3. OL
4. 0.524mV 
5. 1.2mV 
6. ground 
7. 1.215mV
8. OL
9.  OL 
10. 0.714mV

11. OL
12. OL
13. 1.204mV
14. OL
15.  OL
16. OL
17. OL
18. ground
19. OL 
20. OL

21. 22. 0.728mV
23. 1.154mV
24. ground
25. 1.213mV
26. ground
27. 0.919mV
28. 0.973mV
29. 0.875mV
30. 0.523mV

31. 1.382mV
32. 1.382mV
33. 0.526mV
34. 1.382mV
35. 1.382mV
36. 1.382mV
37. 1.381mV
38. 0.998mV
39. 1.363mV
40. 1.378mV