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 2014 full-time average hourly wage rate for occupations in social science, government service and religion, which includes university professors, is $30.56.The 2014 corresponding median weekly wage rate is $1040, giving an approximate full-time annual salary for this employment unit of $54,000. typical full-time annual salary for this occupation is in the region of $60,000 â $80,000. Government data indicates that the labour market for this profession will be balanced for the near future.