Calibrating eyepiece graticule

Question 1

What is the method for calibration?

Answer 1

1. Click lowest objective lens + clip stage micrometer onto stage, moving it right up
2. Focus and match up 0 on stage micrometer with 0 on eyepiece graticule
3. Record how many eyepiece graticule units correspond to 1000um of stage micrometer scale
4. Repeat for other mags

Question 2

What are the 3 magnification values on college microscope?

Answer 2

x4, x10, x40