50 



A. 0. Twining on the Earthquake of October, 1870, 



time at Cleveland, Ohio, is the average of three clocks that were 

 stopped, and is confirmed essentially bj Col. Whittlesey, but 

 without an actual reference of either to a standard time-keeper. 

 From these combined the following table is composed ; of which 

 column 1 gives the place of observation ; column 2, the lati- 

 tude ; column 3, the diiference of local time from New Haven 

 corresponding to the longitude ; column 4, gives the respective 

 local times corresponding to ll*" 19*" 46* — the beginning at New 

 Haven; column 5, is an empirical scale of progress proportion- 

 ed to the differences of longitude and the presumed differences 

 of absolute time at St Johns and Chicago ; column 6, gives 

 the observed times of the earthquake ; column 7 is compara- 

 tive of the two preceding, and shows the presumed error of 

 observation, whether too late or too early at each of the places 

 respectively. It would obviously only obscure the discussion 

 to take account in the table, of times which do not purport 

 in the notices themselves to be near approximations, or which 

 are adopted from the railroad time-pieces without supplying 

 the proper correction, or which are found by comparison with 

 the mass of observations to be grossly in error. To one or 

 the other of these categories belong the notices from Brunswick 

 and Portland, Me., Burlington, Vt, Warrensburg, Saratoga, 

 Cooperstown, Cornell University, and Auburn, N. Y., Scranton 

 and Titusville, Pa. The notice from Cincinnati, Ohio, is re- 

 tained on account of the extreme position. 



1- 



~1~ 



H. 





5. ] 6. 



7. 





if 



'« 



«^- 



^«"t 



&r 



^^■ir-'- 



St. Johns, N. Bruns. 



Z^ 



+ 2Y"34 



n |- 2% 



11 45' "5 1 



\W 



T 5-earlj. 



Bangor, Me. 



44 48 



+ 16 34 











Lewiston. Me. 









11 29 33 ; 





27 late. 



Boston, Mass. 







11 '27 14 





1 25i- 



1 ^learlf. 



Harv. Coll. Oba'y. 



42 23 







11 26 14;: 



L 27*"^ 





Quebec, L.C. 



43 49 











Providence, R. I. 







11 25 53|n 25 15 I 





45 do. 



Norwich, Conn. 







11 22 50U1 22 25 1 





2 25 early. 



Moatpelier, Vt 



44 17 





11 21 4I1I 20 48 1 





3 12 late. 



Hartford, Conn. 







11 20 45ln 20 soil 





4 do. 



New Haven, Conn. 







11 19 Sh 19 36 1 



1 m+ 





srAtiT. 



42 4I 



-2 38 





n 16 31! 



I ^?e8riy- 

 1 16 + da 



Hudson, N. T. 













2 29 do. 



Schenectady, N. Y. 









U 15 54 



1 15 





New York. 













35 do! 







-20 58 



10 58 4f 







13 da 



TownZl^'.Q.' 















CllvelanXwiia ^' 



41 3( 



-35 10 



10 47 44 



{Sl?1'l 



3 44f 



2 25eady. 



Cincinnati, Ohio. 



39 ( 





10 33 40I1O 37 81 









42 01-58 38 



IS 2? '2ilO 25 23il 



) 25 



0_23_da_ 



