80 
MESSRS. W. DE LA RUE AND H. W. MULLER ON THE 
Form of terminals, a paraboloidal point -j- and a plate of l'l in. diameter — . 
1080 CELLS. 1200 CELLS. 2160 CELLS. 
inch. 
inch. 
inch. 
1875. April 8 
0-0038 
1875. Dec. 20 
0-00625 
1875. June 29 
0-02476 
1876. Jan. 12 
0-0034 
0-00700 
July 3 
0-02400 
0-0038 
1876. May 28 
0-00625 
Dec. 20 
0-02000 
0-0030 
0-00600 
1876. Jan. 21 
0-02850 
Feb. 24 
0-0033 
0-00500 
Feb. 24 
0-02100 
0-0033 
0-00600 
Oct. 19 
0-02000 
0"0033 
0-02000 
0-0038 
M can 
0-00608 
0-02000 
0-0038 
0-02000 
Mar. 23 
0-0040 
0-02175 
0-0035 
0-02250 
0-0040 
0-0030 
Mean 
0-02204 
0-0035 
April 1 0-0035 
0-0040 
0-0040 
0-0033 
May 10 0-0030 
0-0030 
May 26 0-0030 
0-0030 
June 7 0"0035 
0-0035 
Oct. 10 0-0037 
Mean 0"0035 
