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.
Average dialysis technician salary. Average annual salary for a dialysis technician in the United States ranges from $26,811 â $40,396 and an average hourly wage ranges from $11.65 to $15.05 per hour.ialysis technician salary in Canada. The average yearly salary for a dialysis technician in Canada is about $38,000 CAD. According to the Vancouver Island Health Authority salary catalogue, a national mean hourly wage for a renal dialysis technician averages is about $22.28 CAD per hour.