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Units of time in Ancient Tamil history:
1 kuzhi(kuRRuzhi)= 6.66 millisecond-the time taken by the Pleiades stars(aRumin) to glitter once.
12(base 8) or 10 kuzhigaL= 1 miy= 66.6666 millisecond-the time taken by the young human eyes to flap once.
6(base 8) or 6 miygaL= 1 siRRuzhi(nodi)= 0.40 second-the time taken for a bubble (created by blowing air through a bamboo tube into a vessel 1 saaN high, full of water) to travel a distance of one saaN .
2(base 8) or 2 nodigaL= 1 vinaadi= 0.80 second-the time for the adult human heart to beat once
12(base 8) or 10 nodigaL= 1 aNu= 4 seconds
6(base 8) or 6 aNukkaL= 1 thuLi= 24 seconds
12(base 8) or 10 thuLigaL= 1 kaNam= 4 minutes
6(base 8) or 6 kaNangaL= 1 naazhigai= 24 minutes
12(base 8) or 10 naazhigaigaL= 1 siRupozhuthu= 240 minutes= 4 hours
6(base 8) or 6 siRu-pozhuthugaL= 1 naaL(1 day)= 24 hours
7 naaTkaL= 1 kizhamai(1 week)
15 naaTkaL= 1 azhuvam(1 fortnight )
29.5 naaTkaL= 1 thingaL(1 lunar month)
2 thingaL= 1 perum-pozhuthu(1 season)
6 perum-pozhuthugaL= 1 AaNdu(1 year)
3600(=106106) AaNdugaL= 1 Oozhi(1 epoch)
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Units of Ancient trade: Volume
1 kuNam= smallest unit of volume
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Length
1 izhai= 30.303 micrometre
1 aNu= 11 izhaigaL= 333.3333 micrometre
1 immi= 7 aNukkaL= 2.3333 millimetre
1 saaN= 100 immi= 23.3333 centimetre
1 muzham= 2 saaN= 46.6666 centimetre
1 kaadham= 5000 saaN= 1166.66 metres= 1.1167 kilometre
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Numbers
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Currency
1 pal(wooden discs/sea shellots)= (approximately) 0.9 grain
8 (or 10 base 8) paRkaL =1 senkaaNi (copper/bronze) = 7.2 grains(misinterpretted by Roman accounts as 10 base 10=9 grains)
1/4 senkaaNi =1 kaalkaaNi (copper) =1.8 grains(misinterpretted by Roman accounts as 2.25 grains)
64 (or 100 base 8) paRkaL = 1 KaaNap-pon a.k.a. Kaasu panam(gold) = 57.6 grains
1 Roman dinarium was traded on par with 2 KaaNappon plus 1 SenkaaNi(=124 grains).
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