Answer:

1. Ocular lense/eyepiece

2. Body tube

3. Revolving nose piece

4 - 6. Objective Lenses (MPO, LPO, HPO)

7. Diaphragm

8. Light source

9. Base

10. Stage

11. Stage clips

12. Arm

13. Fine adjustment knob

14. Coarse adjustment knob

15. Ocular Lense

(I'm pretty sure 1 and 15 are the same but put it anyway :/)