60 seconds to the minute, 60 minutes to the degree and 360 degrees to the circle I love my old compass and imperial micrometeras well . It's all just simple maths and straight ratios. More often than...
Type: Posts; User: Marty Henry
60 seconds to the minute, 60 minutes to the degree and 360 degrees to the circle I love my old compass and imperial micrometeras well . It's all just simple maths and straight ratios. More often than...