s. If on the other hand this volt- age at the center can be cut ^| - 1a alt;a to 0.45 volt, as shown by Fig. 2, Al-*-^ U~- the ... in the track circuit due to variable joint plate contact and high resistance bonds, we quote from a paper presented by Mr.
|Title||:||The Track Circuit Handbook|
|Author||:||Merrill W. Manz, J. B. Weigel, W. P. Bovard|