Commercial engineering for central stations; a compilation of papers dealing with subjects of particular interest to those engaged in central station commercial engineering work
A 1912 McGraw-Hill compilation of technical papers by Arthur Williams and Edmund Tweedy, written for electrical engineers selling and sizing central-station power in American cities. The plates are engineering charts printed on tinted stock: nomograms, cost-per-day rate lines, refrigeration and temperature curves, with hand-lettered axis labels and fine grid rules useful as data-graphic texture.
