Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . their point ofgreatest elevation. NORIA. 1533 NORIA. The modes of constructing and operating are va-rious : — 1. The original form seems to be a wheel withbuckets or pots each pivoted to the rim at a point aboveits center of gravity, so as to liang are submergeil in the water at t!ieir lowest point,and, rising, are upset Ijy contact with a
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . their point ofgreatest elevation. NORIA. 1533 NORIA. The modes of constructing and operating are va-rious : — 1. The original form seems to be a wheel withbuckets or pots each pivoted to the rim at a point aboveits center of gravity, so as to liang are submergeil in the water at t!ieir lowest point,and, rising, are upset Ijy contact with a fixed obsta-cle at their highest point, discliarging into a chuteor trough which conducts the water to a h. Fig. 3333, show two lorms of the device, — awheel with boxes in its rim, and one with susiiendedbuckets. The Cliiuese noria c is made of bamboo, exceptingthe hub of tlie wheel and the posts on which itrests. The buckets are liainboo tulies, inclined so asto hold nearly to their capacity till they reach theirculminating-point. The wheels are from 20 to 40feet in diameter, according to situation, and aredriven by the impinging of the stream upon periph-eral Hoat-boards. One described by Sir George Fig. Norias^ or Bucket- Wheels. Staunton was 30 feet in diameter ; had 20 buckets,4 feet long and 2 inches diameter in the clear, hold-ing ycT of a gallon ; 12 gallons to a revolution, 4revolutions and 48 gallons per minute ; over 300tons per day. The reference to water, and to means for obtain-ing it, are very frequent in the Bible. In the much-misunderstood text in Ecclesiastes we find a refer-ence to tlie nor in : — Or ever the silver cord be loosed, or the goldenhowl broken, or the pitcher be broken at the foun-tain, or the irhccl broken at the cistern. These wheels have been used from time immemo-rial in raising water for irrigation, in Assyria, Egypt,Pereia, Syria, Arabia, and Palestine, and no doubtin China and India, but have undergone many modi-fi
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