+-----------------+------+----------------------+--------+----------+---------+ | | | | |Value of |Value of | | | | |Value of|100 Centi-|Ohm in | | Observer. | Date.| Method. |B.A.U. |metres of |Centi- | | | | |in Ohms.|Mercury |metres of| | | | | |in Ohms. |Mercury. | +-----------------+------+----------------------+--------+----------+---------+ |Lord Rayleigh | 1882 | Rotating coil | .98651 | .94133 | 106.31 | |Lord Rayleigh | 1883 | Lorenz method | .98677 | .. | 106.27 | |G. Wiedemann | 1884 | Rotation through 180°| .. | .. | 106.19 | |E. E. N. Mascart | 1884 | Induced current | .98611 | .94096 | 106.33 | |H. A. Rowland | 1887 | Mean of several | .98644 | .94071 | 106.32 | | | | methods | | | | |F. Kohlrausch | 1887 | Damping of magnets | .98660 | .94061 | 106.32 | |R. T. Glazebrook | 1882 | Induced currents | .98665 | .94074 | 106.29 | | | 1888 | | | | | |Wuilleumeier | 1890 | | .98686 | .94077 | 106.31 | |Duncan and Wilkes| 1890 | Lorenz | .98634 | .94067 | 106.34 | |J. V. Jones | 1891 | Lorenz | .. | .94067 | 106.31 | | | | +--------+----------+---------+ | | | Mean value .98653 | | | | | | | | | |Streker | 1885 | An absolute determin-| | .94056 | 106.32 | |Hutchinson | 1888 | ation of resistance| | .94074 | 106.30 | |E. Salvioni | 1890 | was not made. The | | .94054 | 106.33 | |E. Salvioni | .. | value .98656 has | | .94076 | 106.30 | | | | been used | | | | | | | | +----------+---------+ | | | Mean value .94076 | 106.31 | | | | | | |H. F. Weber | 1884 | Induced current | Absolute measure- | 105.37 | |H. F. Weber | .. | Rotating coil | ments compared | 106.16 | |A. Roiti | 1884 | Mean effect of | with German silver| 105.89 | | | | induced current | wire coils issued | | |F. Himstedt | 1885 | | by Siemens and | 105.98 |