1. Vernier Scales 335 340 345 350 355 0 5 10 15 20 25 30 60 0 60

2. Vernier Scales 335 340 345 350 355 0 5 10 15 20 25 30 60 0 60 0º 0’ 0 degrees 0 minutes

3. Vernier Scales 335 340 345 350 355 0 5 10 15 20 25 30 60 0 60 0º 6’ 0 degrees 6 minutes

4. Vernier Scales 335 340 345 350 355 0 5 10 15 20 25 30 60 0 60 0º 12’ 0 degrees 12 minutes

5. Vernier Scales 335 340 345 350 355 0 5 10 15 20 25 30 60 0 60 0º 30’ 0 degrees 30 minutes

6. Vernier Scales 335 340 345 350 355 0 5 10 15 20 25 30 60 0 60 Standard deviation? You can probably quote values to the nearest 3 minutes (0.05 degrees). Standard deviation defined such that 2/3 of values fall within one standard deviation. σ = (1/3)*smallest increment = 1 minute = 0.0167 degrees = 2.9x10 -4 radians