102 ROYAL SOCIETY OF CANADA 
CONNECTIONS ON THE SIGN BLOCKSs. 
In the following table (Table IL.) the first column gives the value 
of one division on the dial, the second the connections effected by the 
corresponding sign block : 
TABLE II. 
1/1000 Volt...... Sd, 242°9, 12: 10 186118 19701402) 
17500) Volt 8, 18,24 ;9, 12; 49 M9 14928: 
EW L007 Not 8,18, 2459. 112 Oo ea 02. 
LAON Volt ES 1,18: 18,246 T4539, 2301000012 000; 
1+1/100 Volt...8, 11; 9,19; 12, 18, 24; 14, 23. 
1 One Volt. ....1, 8, 18, 24; 5, 14; 7, 23; 9,11; 12, 19. 
1/1000 Ampére.1, 8, 11, 24; 3, 14, 23; 9, 12; 10, 18; 13,19 (1ohm)? 
1/500 Ampére..1, 8, 18, 24; 3, 14, 23; 9, 12; 13, 19 (1 ohm) * 
11/100 Ampére..1, 8, 18, 24; 3, 14, 23 ; 9, 11; 12, 19 (1 ohm) * 
1/100 Ampére..1, 8, 11, 24; 2, 14, 23 ; 9, 12; 10,18; 13, 19 (1, ohm) © 
11/10 Ampère..l, 8, 18, 24; 2, 14, 23; 9,11; 12, 19 (4, ohm) * 
One Ohm - 50 15.22'590,, 12, Li: 8/16 24:10 011 2561926; 
10/ Ohms.) 51) 2215 1,48, bts, 8,0 LG) 2109 25126: 
2100 O0hms:-21/22; 7, 12, 1; 38, 10, 21.9. 1b 25 aoe 
*1,//100,000 Mho::1, 8,16::5,22: 9 11, 29: 13, 17, 20) 157126 
1 710,000 Mho:.1, 8.16 ;4,22; 9 11,25: 15, 17, 213-957: 
11/1000 Mho:1:8 16;:4/225 1217, 21:12) 17; 21% 116 26! 
An example will make the meaning of the table clear. When the 
“volt block ” is set in place, the following connections are made by it: 
Mercury cup No. 1 with mercury cups Nos. 8, 18 and 24; No.5 with 
No. 14; No. 7 with No. 23; No. 9 with No. 11, and No. 12 with No. 19. 
Reference to Table I. shows that the connections complete the circuit 
shown in the following diagram, Table IIL. : 


Tapix IT. 
(—X) 100-——————9900 (+X) 
S—G 
(—2V) W. 203 °7 (+2V) 



NoTE.—Connections made by the block are denoted by heavy lines ; permanent. 
connections by.light lines. 

1 With these blocks the ‘‘ Doubler” may be used. 
2 With these blocks keep 1,000 ohms between (0 V) and [16]. 
3 The internal resistance of the ammeter. 
i ag 
ee : 
Pia 
