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Measurements in ancient Tamil-speaking South India were widely different from modern day metric and imperial systems. These ancient measurement systems spanned systems of counting, distances, volumes, time, weight as well as tools used to do so. While India is one of the countries to use the metric system International System of Units (Tamil Nadu state included), some of these older day measurement systems, especially those of counting are used in the present day. Other units that have persisted are those of area – the 'ma' (not to be confused with the dollar-cent) and the ‘ground’, both used to measure land and the ‘molam’ which has been relegated to measuring the length of a sandanam garland sold on streets. There are several similarities between the measurement system used in Tamil Nadu and that used by the Indus Valley civilisation. A shift of Indian mathematicians to South India after the 12th century〔(Indian Institute Of Science, Landmarks of Science in Early India - Michael Danino )〕 could be a driving factor for homogenisation. However, this remains a hypothesis because study of ancient science has been neglected in India. A large number of ancient manuscripts in Kerala and Tamil Nadu remain untranslated and unpublished.〔 == Units of time in ancient Tamil history == *12 (base 8) or 10 kuzhigaL = 1 miy = 66.6666 millisecond-the time taken by the young human eyes to flap once. *2 kaNNimaigaL (கண்ணிமைகள்) = 1 kainodi (கைநொடி) = 0.125 second *2 kainodi = 1 maatthirai (மாத்திரை) = 0.25 second *6 (base 8) or 6 miygaL = 1 siRRuzhi (nodi) சிற்றுழி (நொடி) = 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 (சாண்). *2 maatthiraigaL = 1 kuru (குறு) = 0.50 second *2 (base 8) or 2 nodigaL = 1 vinaadi வினாடி = 0.80 second-the time for the adult human heart to beat once *2 nodigaL = 2 kuru = 1 uyir உயிர் = 1 second *5 nodigaL = 2 uyir = 1 saNigam சாணிகம் = 1/2 aNu அணு = 2 seconds *12 (base 8) or 10 nodigaL = 1 aNu = 4 seconds *6 (base 8) or 6 aNukkaL = 12 saNigam = 1 thuLi துளி = 1 naazhigai-vinaadi நாழிகை வினாடி = 24 seconds *12 (base 8) or 10 thuLigaL = 1 kaNam கணம் = 4 minutes *6 (base 8) or 6 kaNangaL = 1 naazhigai= 24 minutes *12 (base 8) or 10 naazhigaigaL = 4 saamam சாமம் = 1 siRupozhuthu சிறுபொழுது = 240 minutes = 4 hours *6 (base 8) or 6 siRu-pozhuthugaL = 1 naaL நாள் (1 day) = 24 hours *7 naaTkaL = 1 kizhamai கிழமை (1 week) *15 naaTkaL = 1 azhuvam அழுவம் (1 fortnight) *29.5 naaTkaL = 1 thingaL திங்கள் (1 lunar month) *2 thingaL = 1 perum-pozhuthu பெரும்பொழுது (1 season) *6 perum-pozhuthugaL = 1 AaNdu (1 year) *64 aaNdugaL = 1 vattam வட்டம் (1 cycle) *4096 (=8^4) AaNdugaL = 1 Oozhi ஊழி (1 epoch) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tamil units of measurement」の詳細全文を読む スポンサード リンク
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