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 natural and applied sciences and related occupations, which includes mining engineers, is $34.65. The 2014 corresponding median weekly wage rate is $1275, giving an approximate full-time annual salary for this employment unit of $66,000.he table below details the hourly wages for Mining Engineers. The Canadian national occupation classification code (NOC) for this role is 2143. Job titles and exact duties vary in this occupation and examples of some job titles are: mining engineer, mineral engineer and mine safety engineer.