LONGITUDE OF THE TOEONTO OBSERVATORY. 



47 



TABLE IV. 

 Ob.servatioxs for Peksoxal Equation, September 15, 1883, Toronto. 



O VV. C. McLEUD. 



Normal equations : 



13 000(// + 3.101(/(i -1.414 =0 



8.101(/( +22.784877rfa +5.324611 = 



Whence dt = +0 0.170 da = -0.257 



Assumetl t = +5 9.300 a = 0.000 



t + dt = +5 9.470 a + (/(I = -0.257 



ami probabk' error of dt = i0.024. 



measured c + 0.262 



O \V. 



C. CARPMAEL. 



Normal equations : 



8.5732(7/ +0.76425f7a +0.06837 = 

 0.76425r7/ +6.8451(7a +2.206139 = 



Whence 

 Assunieil 



(7/ = +0 0.021 



/ = +5 0.280 



(It = +5 0.301 



ami probable error of 



(7(1 



a 



+ da 



dt 



-0.325 



0.000 



-0.325 



±0.024. 



C. measured = + 0.262 O W. 



m. s. 



C. Carpmael / + (7/ = 5 9.301 ± .024 



C. McLeod / + dt = 5 9.470 ± .024 



Personal equation (JI. -C.) = 0.169 ± .0.34 



