1 8 8 1 – 1 9 5 5 ), ▁U . S . ▁Senator ▁from ▁New ▁Jersey ▁David ▁B air d ▁Sr . ▁( 1 8 3 9 – 1 9 2 7 ), ▁U . S . ▁Senator ▁from ▁New ▁Jersey ▁▁ ▁U . S . ▁state ▁sen ate ▁members ▁Del pha ▁B air d ▁( born ▁ 1 9 3 0 ), ▁Ut ah ▁State ▁Senate ▁John ▁B air d ▁( Mich igan ▁politician ) ▁( 1 8 5 9 – 1 9 3 4 ), ▁Michigan ▁State ▁Senate ▁La Ro y ▁B air d ▁( 1 8 8 1 – 1 9 5 0 ), ▁North ▁Dak ota ▁State ▁Senate ▁Samuel ▁T . ▁B air d ▁( 1 8 6 1 – 1 8 9 9 ), ▁Louisiana ▁State ▁Senate <0x0A> </s> ▁Princi p ia ▁may ▁refer ▁to : ▁▁ ▁Phil os op hi æ ▁Natur alis ▁Princi p ia ▁Mathemat ica , ▁Isaac ▁Newton ' s ▁three - volume ▁work ▁about ▁his ▁laws ▁of ▁motion ▁and ▁universal ▁grav itation ▁ ▁Princi p ia ▁( ▁" primary ▁buildings "), ▁the ▁headquarters ▁at ▁the ▁center ▁of ▁Roman ▁for ts ▁() ▁ ▁The ▁Princi p ia , ▁and ▁educational ▁institution ▁for ▁Christian ▁Scient ists ▁in ▁the ▁St . ▁Louis , ▁Missouri , ▁area ▁ ▁Princi p ia ▁College , ▁a ▁private ▁four - year ▁college ▁in ▁Els ah , ▁Illinois ▁▁ ▁Princi p ia ▁School , ▁a ▁school ▁from ▁early ▁child hood ▁to ▁high ▁school ▁in ▁the ▁St . ▁Louis ,