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.
Vascular Technologists in the United States can expect wages of $29.12 per hour on average.Earnings sit near $21.67 per hour on the lower side but can approach $37.80 on the higher side. Career length and the particular city each impact pay for this group, with the former having the largest influence.United States). Vascular Technologists in the United States can expect wages of $29.12 per hour on average. Earnings sit near $21.67 per hour on the lower side but can approach $37.80 on the higher side. Career length and the particular city each impact pay for this group, with the former having the largest influence.