104 REPORT ON 



Horizontal Intensity. Observations of Vibrations. 

 Monte Video, January 18, 1866. 



No. Time P.M. No. Time P. M. ^^Int 



2" 55™ 



2 56 



2 57 



2 58 



2 59 



9 s - 3 

 9.2 



9-4 



9-4 

 9-4 

 9.8 



No. 



io m II».4 



11 11. 4 



12 11. 5 



13 II. 9 



14 12. 1 



15 12.1 



Mean 



Time of 1 50 

 vibrations. 



2 s . I 

 2.2 

 2 I 

 2-5 

 2-7 

 2-3 



15 2.32 



Extreme scale readings, 



At beginning .... 58-° — 100.2 



At end 65.8 — 91.6 



Temperature 86°. o 



Time of one vibration . . 6 s . 01 5 



Monte Video, January 19, 1866. 







3" 



3' 



10 



3 



4 



20 



3 



5 



30 



3 



b 



40 



3 



7 



50 



3 



8 



8=.8 

 8.9 



9-3 

 9.4 



9-7 

 10. i 



150 



160 

 170 

 180 

 190 



200 



ii".8 

 12.2 

 12.6 

 12.6 



Mean 



i5 m 3 3 -° 



•5 



Extreme scale readings, 



At beginning .... 56.0 — 102.0 



At end 66.6 — 91.5 



Temperature 89°. 5 



Time of one vibration . . 6 s . 02 1 



Sandy Point, February 7, 1866. 



It h 37 m 

 11 38 

 11 39 

 11 40 

 11 41 

 11 42 



4 s - 5 

 4-5 



n h 51" 583.4 



11 52 58.4 



» 53 58-2 



11 54 58.0 



" 55 57-8 



11 56 57.8 



Mean . 



Time of 150 



vibrations. 



I4» 



53"-9 



H 



53-9 



14 



54-5 



H 



53-9 



H 



54-5 



14 



55-3 



H 54-33 



Extreme scale readings, 

 At beginning . . 

 At end .... 



Coefficient of torsion 



Temperature . 



Time of one vibrati 



61.0 — 100.0 



60.5 — 97.5 



v= 6.85 div. 



7i°-5 

 5>. 962 



Magnet rendered quite unsteady by the high wind. 



Valparaiso, March 2, 1866. 



No. 



O m 3S.4 



1 2.2 



2 0.6 

 2' 59-4 



3 57-4 



4 55-7 



No. 



5b 14m 41S.0 



Time of 150 

 vibrations. 



14m 37 ».6 

 14 37-1 

 14 37-2 

 14 37-2 

 14 37-7 

 14 38.0 



H 37-47 



Extreme scale readings, 

 At beginning . 

 At end .... 



Coefficient of torsion 



Temperature . 



Time of one vibration 



99.8 — 56.8 

 97.8-57.8 

 v = 6.17 div. 

 72°. 5 

 53.850 



Valparaiso, March 19, 1866. 



I n 42 m 



1 43 

 1 44 



1 45 

 1 46 



1 47 



6=.6 

 5-6 

 4.2 

 3-° 

 1-9 

 0.8 



150 

 160 

 170 

 180 

 190 

 200 



50 s . 2 

 .6 

 7 



Time of 150 

 vibrations. 



14™ 43 s - 6 

 14 43-° 

 14 43-5 

 H 43-3 

 H 43-0 

 14 43-3 



14 43-28 



Extreme scale readings, 

 At beginning . 

 At end .... 



Coefficient of torsion 



Temperature . 



Time of one vibration 



65-0 — 95-8 

 61.2 — 96.8 

 z> = 4-75 div. 

 76°.o 

 5*. 889 



Valparaiso, March 19, 1866. 

 Inertia ring on magnet. 



2 h ^ 2 m 5S.4 

 2 33 



150 

 160 

 170 



190 



200 



2 h g T m o s .4 

 2 52 15-8 

 2 53 3°-8 

 2 54 47-2 

 2 56 1.2 

 2 57 15-8 



Mean 



Time of 150 

 vibrations. 



18- 55S.0 

 18 54.6 

 18 54.0 

 18 54-7 

 IS 53.0 

 18 51.9 



18 53.S7 



Extreme scale readings. 



At beginning . 



At end .... 

 Coefficient of torsion 

 Temperature . 

 Time of one vibration 



61.6 — 98.9 

 73.3 — 84.0 

 v = 6.82 div. 

 73°.o 

 7 B -559 



