In an early, simple hay tedder described in 1852 and manufactured in Edinburgh by the company of Mr. Slight, the two wheels, via a spur wheel and a pinion, drive a set of light wheels, the rake wheels; on these two rake wheels are mounted eight rakes, which pick up and disperse the hay.
It should be noted, how-ever, that only about 1 out of every 10 STEM workers has a high school diploma or less. Those with gradu-ate degrees in a STEM job earned more than $40 per hour, nearly $4.50 more per hour on average than those with non-STEM jobs.
The Top Paying STEM Jobs For Recent Grads. STEM jobsâthose requiring a science, technology, engineering, or math-related degreeânot only account for more than 10% of jobs in the United States, many of them pay wages close to double the U.S. average, according to data from the Bureau of Labor Statistics.