Atmospheric-Electric Observations, 1915-16 



399 



Atmospheric-Electric Observations: Penetrating Radiation 



(Form 104) 



Station: At sea 

 Date: Jan. 15, 1916 

 Instrument: P. R. A. 1 



Lot: 54?3 S 

 Com'd'r: J. P. A. 

 Watch: 70 



Long: 326?8 E 

 Obs'r: H. F. J. 



Watch Time 



Remarks 



h m s 

 11 39 15 

 11 42 30 



11 44 20 

 11 51 00 



11 52 15 

 11 58 15 



12 02 10 

 12 07 30 



12 07 50 

 12 12 55 



Means U"" uG^l 



195 



5.13x10-' 



400 



2.50X10-S 



:300 



2.78X10- 



d d d 



9 = 49.0-48.0 = 1.0 

 volts volts volts 

 «F = 0. 17-0.56 = 39 



Very rough ®ea 



320 



3.12X10-' 



305 



3.28X10- 



3.36X10-» 



12'' 15" = local mean time 



fl = fixed alteration in scale divisions 

 SF= fixed alteration in volts 

 C = capacity of system =9.8 cm. 



e = electronic charge = 4 . 8 X 10"'° E.s.u. 

 [/ = volume of apparatus = 21 . 6 X 10' c.c. 

 R = number of pairs of ions produced per 



CiVT. 



c. c. per second = 



300 Ue 



= 4.22 



Ship's Chronometer 

 Corr'n on G. M. T. 



G. M. T. 

 Long. 



L. M. T. 

 Watch 70 reads 



Corr'n on L. M. T. 



h m 

 12 23.8 

 - 9.3 



+ 19 1 



