9 1 6 . ▁The ▁use ▁of ▁cl ay ▁t iles ▁suggests ▁that ▁it ▁was ▁influenced ▁by ▁the ▁work ▁of ▁the ▁Iowa ▁Agricult ural ▁Ex periment ▁Station ▁in ▁the ▁early ▁ 2 0 th - century . ▁It ▁has ▁a ▁diameter ▁, ▁and ▁a ▁height ▁of ▁. ▁ ▁The ▁bar n ▁features ▁a ▁two - p itch ▁roof ▁and ▁a ▁ ▁central ▁cl ay ▁tile ▁sil o . ▁It ▁was ▁built ▁as ▁a ▁da iry ▁bar n ▁and ▁it ▁was ▁used ▁as ▁such ▁until ▁ 1 9 7 8 . ▁D air y ▁cow ▁stan ch ions ▁surr ound ▁the ▁central ▁sil o ▁on ▁one ▁side ▁of ▁the ▁bar n ▁in ▁a ▁circular ▁arrangement , ▁and ▁horse ▁st alls ▁surr ound ▁the ▁other ▁side . ▁The ▁bar n ▁has ▁been ▁listed ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁since ▁ 1 9 8 6 . ▁ ▁References ▁ ▁Category : Bar ns ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁Iowa ▁Category : Build ings ▁and ▁structures ▁completed ▁in ▁ 1 9 1 6 ▁Category : Build ings ▁and ▁structures ▁in ▁Ch ick as aw ▁County , ▁Iowa ▁Category : R ound ▁bar ns ▁in ▁Iowa ▁Category : National ▁Register ▁of ▁Historic ▁Places ▁in ▁Ch ick as aw ▁County , ▁Iowa <0x0A> </s> ▁J atro pha ▁integer r ima , ▁commonly ▁known ▁as ▁per egr ina ▁or ▁sp icy ▁j atro pha , ▁is ▁a ▁species ▁of ▁flow ering ▁plant ▁in ▁the ▁sp ur ge ▁family , ▁Eu ph orb ia ceae ,