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 10 Best-Paying STEM Jobs For Recent Grads. Recent grads with a bachelorâs degree and less than three yearsâ experience in the workforce typically earn $39,700 a yearâbut that number can more than double for those in positions in science, technology, engineering, and math.