Rubuta ci gaba ga wannan sakin layi - Gidan Siebenberg yana zaune a kan rami mai zurfi. Zai yiwu cewa bayan gano wadannan kogwanni, mutanen Yahudawa suka kara zurfafawa don ƙirƙirar hanyoyin rami a cikin ilimin ƙasa na dutse. A tarihi, ana amfani da wasu daga cikin wadannan ramuka don samar da ruwa a kusa da Tsohon Garin. Sa'ad da Aka Kewaye Urushalima (The Great Revolt
) a cikin 70 CE, Yahudawa sun yi amfani da ramuka a matsayin hanyar tserewa daga Romawa.