Pacific Gas and EIrctric Company, San Franrlsco. California. A. Three-Dimensional Curve of the 1935 Load of the Consolidated System of the Pacific Gas and Electric Connpany.

1. Dimensions of the model, excluding base, are 12" x 24" x 12" high.

2. The front black section represents a load curve showing variation from day to day

throughout the year for the last half hour of each day. The clefts between the tifty-two sections are Sundays. Additional clefts are the holidays.

The Detroit Edison Company, Detroit, Michigan. SCALE .5

B. Three-DImensional Curve of the 1935 Load of the Detroit Edison Company.

Apparently the data for the entire year were gathered before this model was started. The load for the first half-hour of each day for the entire year was then cut out, and for each half-hour after that, making 48 curves. Compare this with 354 in which the load for each day was plotted, making 365 curves.

GRAPHIC PRESENTATION

i Specific Structural unm5 of the Basic Fopmula |

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Harry H. Laughlin, Department of Genetics, Carnegie Institution of Washington, Cold Spring Harbor, Long Island, N. Y. SCALE .7

A. The Mathematical Model for the Specific Formula of Heredity.

W. D Johnston. Jr., and T. B. Nolan, "Isometric Block Diagrams in Mining Geology." Economic Geology. August 1937, SCALE .5

B. Block Diagram of a Large Mine Drawn by the Isometric Method. The Original Drawing Is Eight Feet Long.