a3o>c

\l

r

'Strnday.

Arrived - time D Bridged - time

E Waiting far bridge - houra.

Loaded - time ^ . Beparture - time.

Fig. 62. Operation of Freight Car-Floats at a Railroad and Steamship Terminal

In Fig. 61 several different railroad connections were shown on one large sheet. Here, in Fig. 62, but one railroad is represented on one sheet, with the idea of using as many sheets as there are railroad connections.

This illustration is photographed down from a sheet of 8^ 2-inch by 11-inch co-ordinate paper specially designed for use with a typewriter. The zinc cut for this illustration was made directly from the typewritten original

TIME CHARTS 63

Percentages up to 100 per cent can be indicated by using fifty of the fifty-two squares on the long dimension of tlie paper. Tliis ruling gives a co-ordinate paper which is extremely convenient for general work. Other charts drawn on this same ruling of paper may be seen in Figs. 134, 130, 103, 156.

Fig. 63 was adapted from a chart shown in the United States Statistical Atlas for the Census of 1900. The Atlas illustration was printed in color, while Fig. 63 is in black ink. The scheme of this chart is one which could be used widely, for it is an extremely convenient method of showing a frequently changing rank for a large number of units. The blocks for the various States are numbered according to the rank of each State at the first year shown at the left. The rise or fall in rank of each State at each census can be seen at once by following the lines joining the numbered blocks. The actual numerical rank at each census is seen by reading horizontally to the rank number at the right-hand margin or to the numbers in the left-hand column of blocks.