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 mean hourly wage technicians earned in the industry was $17.75. Patient care technicians working for the federal executive branch earned a mean hourly wage of $17.23, while the mean hourly wage that technicians working at colleges, universities and professional schools received was $15.48.laska was the top-paying state for patient care technicians, paying nursing aides, orderlies and attendants a mean hourly wage of $16.68 as of May 2011, according to the statistics bureau.