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.
Among the eight most popular STEM jobs that do not require a college degree, six paid more than the national annual average wage of $45,230. There were nearly 500,000 people working as computer systems analysts in 2011, a position that does not require a bachelor's degree and paid $82,320, on average.igh-tech jobs that don't require college degree. Mike Sauter, 24/7 Wall St. 7:06 a.m. EDT July 6, 2013. Half of all STEM -- science, technology, engineering and math -- jobs are done by employees without a bachelor's degree.