No. 2] TRIAD SYSTEMS— WHITE, COLE, CUMMINGS. 31 



Trains for the System IIC. 



Twenty classes of trains terminating in triads of the system: (1) One train, figure 26; (2) 1 

 train, figure 25; (3) 1 train, figure 21 ; (4) 2 trains, figin-e 55; (5) 2 trains, figure 56; (6) 2 trains, 

 figure 90; (7) 1 train, figure 14; (8) 2 trains, figure 50; (9) 2 trains, figure 88; (10) 2 trains, 

 figure 16; (11) 1 train, figure 15; (12) 2 trains, figure 86; (13) 2 trains, figure 82; (14) 2 trains, 

 figure 44; (15) 2 trains, figure 83; (16) 2 trains, figure 36; (17) 2 trains, figure 74; (18) 2 trains, 

 figure 40; (19) 2 trains, figure 67; (20) 2 trains, figure 65. 



Trains for the System IID. 



Twenty classes of trains terminating in triads of the system: (1) One train, figure 26; (2) 1 

 train, figure 25; (3) 1 train, figure 21; (4) 2 trains, figure 19; (5) 2 trains, figure 59; (6) 2 trains, 

 figure 89; (7) 1 train, figure 15; (8) 1 train, figure 14; (9) 2 trains, figure 50; (10) 2 trains, figure 

 16; <11) 2 trains, figure 43; (12) 2 trains, figure 87; (13) 2 trains, figure 84; (14) 2 trains, figure 

 45; (15) 2 trains, figure 34; (16) 2 trains, figure 36; (17) 2 trains, figure 69; (18) 2 trains, figure 

 76; (19) 2 trains, figure 72; (20) 2 trains, figure 40. 



Trains for the System HE. 



Nine classes of trains terminating in triads of the system: (1) 1 train, figure 5; (2) 4 trains, 

 figm-e 26; (3) 6 trains, figure 25; (4) 4 trains, figure 21; (5) 8 trains, figure 55; (6) 2 trains, 

 figure 14; (7) 4 trains, figure 50; (8) 2 trains, figure 15; (9) 4 trains, figm-e 36. 



Trains for the System IIF. 



Thirteen classes of trains terminating in triads of the system: (1) 2 trains, figure 21 ; (2) 2 

 trains, figure 15; (3) 2 trains, figure 51 ; (4) 1 train, figure 14; (5) 4 trains, figure 52; (6) 2 trains, 

 figure 16; (7) 4 trains, figure 45; (8) 2 trains, figure 70; (9) 2 trains, figure 80; (10) 4 trains, 

 figure 39; (11) 2 trains, figm-e 33; (12) 4 trains, figure 75; (13) 4 trains, figure 64. 



Trains for the System IIIA. 



One class of trains terminating in triads of the system: (1) 35 trains, figure 5. 



Trains for the System IIIB. 



Three classes of trains terminating in the triads of the system: (1) 7 trains, figiu-e 5; (2) 24 

 trains, figure 25; (3) 4 trains, figure 14. 



Trains for the System IIIC. 



Four classes of trains terminating in triads of the system: (1) 1 train, figiu-e 5; (2) 12 

 trains, figure 25; (3) 16 trains, figure 23; (4) 6 trains, figure 14. 



Trains for the System HID. 



Two classes of trains terminating in triads of the system: (1) 28 trains, figure 23; (2) 7 

 trains, figure 14. 



Trains for the System IVA. 



Five classes of trains terminating in triads of the system: (1) 1 train, figure 5; (2) 8 trains, 

 figure 25; (3) 16 trains, figure 19; (4) 6 trains, figure 15; (5) 4 trains, figure 14. 



Trains for the System IVB. 



Eleven classes of trains terminating in triads of the system: (1) 1 train, figure 25; (2) 4 

 trains, figure 23; (3) 4 trains, figure 56; (4) 4 trains, figure 59; (5) 3 trains, figure 14; (6) 3 

 trains, figure 15; (7) 2 trains, figure 50; (8) 4 trains, figure 52; (9) 4 trains, figure 17; (10) 

 2 trains, figure 36; (11)4 trains, figure 39. 



