MEASURINd TlIK VIBKATOKY I'EIUODS OF TUNING-FORKS. 



Tai!LE Vll— Ooutiiifiul. 



51 



(1) 

 (^) 



(4) 



(o) 



(0). 



. . 1535. 2 

 ..17iH1.3 

 ..2047. (• 



(10).... 230,'. 1 

 (H) 



(12)....2S14.0 

 (13)....3U7I.l 



(7)— (1)— 0=255. 85 



(H)-(2)— 6=255. 97 



(9)— (D— 8=255.86 



(101— (4)— 6=255.97 



(12)- (4)— 8=255.96 



(13)— (5)— 8=255. 95 



Meau 255.927 



CoiT. for teuip. . .. +.192 



Coir, forelock. 



256. 119 

 . —.028 



256. 091 



(7)— (1)— 6=256. Oil 



(8)— (2)^6=255. 9S 



(9)— (3)— 6=255. 9N 



(10)— (4)— 6=255.97 



(11)— (5)— 3=2.55.95 



Mean 2.55. 976 



Corr. for temp .. +.120 



Corr. for clock. 



256. 096 

 . —.028 



256. 068 



(")-(l)— 6=255.97 

 (*^)— (2)— 6=2.56. 10 

 (9)— (3)— 6=256. no 

 (10)— (4)— 0=250.02 

 (II)— (5)— 6=255.97 

 (12)-(4)— 8=256.02 

 (13)— (7)— 6=256. 03 



Mean 



Corr. for temp. 



Corr. for clock 



.256.016 

 . +. 120 



256. 136 

 . —.028 



256. 108 



Temp. 75° Falir. 



No. 6. 



75—65=10 



10x.012=.120 



(1).... 0.7 

 (2). ...258.6 

 (3).... 512. 7 

 (4).... 770. 5 



(5) ...1024.7 

 (6).... 1282. 7 

 (7).... 1536. 6 

 (8).... 1794. 5 



(7)— (1)^6=255.98 



(8)— (2)— 6=255.98 



(9)— (3)— 6=2.56. 00 



(10)-(4)— 6=2.56. 02 



(11)— (5)— 6=255.98 



(12)— (6)^6=256. 03 



(9).... 2048. 7 

 (10).... 2306. 6 

 (U).... 2560. 6 

 (12)....281-.9 



Meau 255. 998 



Corr. for temp... +. 120 



2.56. 118 

 ( 'orr. for clock ... — . 028 



256. 090 



Temp. 75° Fahr. 



No. 7. 

 75—65=10 



(1)... 

 (2)... 

 (3)... 

 (4)... 



10x.012=120 Temp.76J Fahr. 



0.1 (5) 1023.7 



2.57.9 (6) 1281.6 



512.11 (7).... 1536.0 



770.0 (8).... 1794.0 



(7)— (1)— 6=2.35.98 



(8)-(2)— 6=2.56.02 



(9)— (3)— 6=255. 92 



(10)— (4)— 6=2.56. 05 



(11)— (5)— 6=256.05 



(12)— (6)— 6=256. 12 



(9).... 2047. 5 

 (10).... 2306. 2 

 (11). ...2.560.0 

 (12). ...2818.3 



Meau 256.020 



Cori'. for temp ... +. 120 



256. 140 

 CoiT. for clock ... — . 028 



256.112 



No. 8. 

 70—65=11 



11X.012=132 



(1)..-. 0.0 (5).... 1023. 7 (9).... 2048. 1 



(2).... 254. 1 (6;.... 1278. 1 (10) 



(3).... 512.0 (7).... 1.536.2 (11) ....2559. 9 



(4).... 766.0 (8)... .1790.1 



(7)— (1)— 6=256.03 

 (8)— (2)— 6=256. 00 

 (9)— (3)— 6=256. 02 

 (8)— (4)— 4=256. 02 

 (11)— (5)— 6=2.56.03 



Mean 2.56.020 



Corr. for temp.. . +. 132 



Corr. forelock. . 



256. 152 



. —.028 



256. 124 



