Show A scientific INVENTION an lot rutn t which lie ito crl llin I 1 ri carleton Cai loton college lias has secured ft a cur curious lotis instrument Invent ea by a 11 scientist it ash ln tun and bui J cailoa a personal OnI equation I midi lne says a letter to vaul pioneer press the object of alio tit instrument la is to alio ob st ii r ri irions of it different persons ba alio are arc corking together at nt times or it at it alio llio buno tittle time astronomers well c know that no two dimir per suns long hou exactly alike by xvi liell is ii meant for no two to persons will a y a stir star pisses passes a wire lio in a aclo at exactly the same instant ono one vill recerd Us its apparent appi api rent arent cassago 10 slow lo on oil truo thilo 10 ile ri nother all will almost uniformly put its tinia fist fast observers form arni a bahit ot of seeing objects fast or slow on trim into time thile ami the better belter the observers tho more steady this error isas Is ili compared with true till tanni this 1 bis error tho astronomer calls tho poi per bonal oil I 1 of the observer in ili amount tile personal equation qu atlon varies from 0 0 ot of it a 1 cf tilli kiino 0 to sonic ome g iliin thing more than half a second tor for HUM differ plit own oli wavers rai castor slow slon on oil trim trae ahll such errors onorfis as these can cinn not olbo ito tolerated at all lit in astronomical a lions for fundamental or original work oric of 3 1 ikc liml but must bo in ili wine boroo way avay e before final reductions can call bo be attempted to tills this in ono way may nn an ino ilio ge lilous inac lilno lias has been c 0 eruct p a which sets in motion an air LE cial clil atar b tar qui tOlke tho tippe aranco of a ical 1011 stir star in ill tile talt teles colm As tills altar litts vs lit in tho machine tit alio olt er record lily his observations and tile in Ont automatic illy records tit alio ox fix net alino of alio ril of tile star over the samo same wires now cotil records tire made by tho the ald aid of tile elc electric etric current anil and consequently aio perfectly truo true ali in ink on oil fill instrument called a find anil hanco their differences call bo be inea with alli tile utmost accuracy and tit in this way tile nor error of the observer on oil truo true time la 13 satisfactorily 11 ay known iba Is 3 in uso use every avory night that observers era work vork either together or singly bo that changes in individual personal equations may lie bo detected as well all as the differences that ma may exist between observers the instrument therefore standard for acau rate observation |