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.
Most computer scientists work in full-time salaried positions. For those who work on a part-time or contract basis, the mean hourly wage for computer scientists is $48.51, with most falling in the range of $27 to $64 per hour, depending on geographic location, experience, skill set, publications and body of work.or those who work on a part-time or contract basis, the mean hourly wage for computer scientists is $48.51, with most falling in the range of $27 to $64 per hour, depending on geographic location, experience, skill set, publications and body of work.