ortheast ▁side . ▁A ▁tower ▁attached ▁to ▁the ▁building ▁was ▁removed ▁in ▁ 1 9 4 7 . ▁In ▁ 1 9 7 7 ▁the ▁fire ▁department ▁moved ▁to ▁a ▁new ▁station ▁on ▁the ▁opposite ▁side ▁of ▁Columbia ▁Street . ▁ ▁It ▁was ▁added ▁to ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁ 1 9 8 2 . ▁ ▁References ▁▁ ▁Category : Fire ▁stations ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁Indiana ▁Category : Ital ian ate ▁architecture ▁in ▁Indiana ▁Category : G overn ment ▁buildings ▁completed ▁in ▁ 1 8 8 8 ▁Category : Build ings ▁and ▁structures ▁in ▁Evans ville , ▁Indiana ▁Category : National ▁Register ▁of ▁Historic ▁Places ▁in ▁Evans ville , ▁Indiana <0x0A> </s> ▁Ph osph orus ▁ox o ac id ▁is ▁a ▁generic ▁name ▁for ▁any ▁acid ▁whose ▁mole c ule ▁consists ▁of ▁atoms ▁of ▁ph osph orus , ▁o xygen , ▁and ▁hydro gen . ▁ ▁There ▁is ▁a ▁potentially ▁infinite ▁number ▁of ▁such ▁comp ounds . ▁ ▁Some ▁of ▁them ▁are ▁un stable ▁and ▁have ▁not ▁been ▁isolated , ▁but ▁the ▁derived ▁an ions ▁and ▁organ ic ▁groups ▁are ▁present ▁in ▁stable ▁sal ts ▁and ▁est ers . ▁The ▁most ▁important ▁ones ▁— ▁in ▁bi ology , ▁ge ology , ▁industry , ▁and ▁chemical ▁research ▁— ▁are ▁the ▁ph osph or ic ▁ac ids , ▁whose ▁est ers ▁and ▁sal ts ▁are ▁the ▁ph osph ates . ▁ ▁In ▁general , ▁any ▁hydro gen ▁atom ▁bond ed ▁to ▁an ▁o xygen ▁atom ▁is ▁acid