▁after ▁the ▁work ▁piece ▁has ▁d ried ▁ade qu ately . ▁▁ ▁The ▁pole ▁lat he ' s ▁origin ▁is ▁lost ▁in ▁anti qu ity ; ▁it ▁is ▁known ▁that ▁Vik ings ▁used ▁them ▁from ▁the ▁arch ae ological ▁finds ▁at ▁J ór ví k , ▁the ▁Vik ing ▁settlement ▁discovered ▁beneath ▁the ▁modern ▁city ▁of ▁York ▁in ▁England . ▁The ▁use ▁of ▁pole ▁l ath es ▁died ▁out ▁in ▁England ▁after ▁World ▁War ▁II . ▁It ▁has ▁seen ▁a ▁return ▁through ▁the ▁increased ▁interest ▁in ▁green ▁wood work , ▁although ▁the ▁majority ▁of ▁pract ition ers ▁are ▁at ▁the ▁h ob by ▁rather ▁than ▁professional ▁level . ▁Ar ound ▁Britain ▁there ▁are ▁regular ▁courses ▁for ▁learning ▁the ▁art ▁of ▁pole ▁lat he ▁turning ▁and ▁associated ▁skills , ▁cul min ating ▁in ▁making ▁ch airs ▁or ▁simpler ▁items . ▁The ▁use ▁of ▁the ▁spring ▁pole ▁lat he ▁as ▁well ▁as ▁other ▁reci proc ating ▁l ath es ▁has ▁found ▁a ▁minor ▁following ▁Europe ▁and ▁the ▁United ▁States ▁following ▁the ▁example ▁found ▁with ▁the ▁Association ▁of ▁P ole - lat he ▁Turn ers ▁& ▁Green ▁Wood work ers ▁based ▁in ▁England ▁https :// www . b od gers . org . uk /. ▁ ▁As ▁the ▁wood ▁is ▁turned ▁green ▁or ▁un season ed ▁it ▁will ▁shr ink ▁slightly ▁as ▁it ▁d ries . ▁This ▁is ▁in ▁slightly ▁different ▁proport ions ▁in ▁line ▁with ▁the ▁growth ▁rings ▁and ▁across ▁them ▁and ▁this ▁differential ▁shr ink age ▁means ▁the ▁work ▁piece ▁becomes ▁very ▁slightly ▁elli