Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1265
^ ^ o ^ ntf < t/1 W r) H Q H hT ^ H < U U) oi < H O W H U :^ e:^ ^ < O H i_j u ;?^ M w n 12: 8 < 12; <r; o w Q Q < w WH< 12; S < C/3 s 2 Switch Boards 1231 Fig. 557 shows the same panel when capacity is larger.The panel at left is for 1,000 and 1,200 K. W., the nextfor…