Engine power, Horse power
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AT the last Perth Royal Show, a farmer accompanied by his young son was deeply immersed in a discussion with a tractor salesman. The youngster eyed the display machine carefully as his elders discoursed on belt horse-power and drawbar horse-power. Finally he said, "What ARE all these horse-power things Dad—I can't see 'em?"
Stanley, F. R.
"The elusive thing called horse-power,"
Journal of the Department of Agriculture, Western Australia, Series 3: Vol. 8
, Article 6.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture3/vol8/iss4/6