The numbering of the pages when folded is not necessarily in 1-2-3 order. The binder, therefore, should be the one to do the numbering.

PROBLEMS IN THE CREATION OF THIS BOOK

Ai thi* hooh may hr rrviKd, any tugBrttioni from thr rradrr friativr to (iOMlhtlill«« for im|>rovrmml. rtthrr in make-up or rontrr«t, arr invited.

The aim of this hook was to srciirr the Kreateit potsihie numhcr of illuitrationt and to reduce the text to the minimum.

A majority of the charts prrarntcd in thu hook were rrilured to fit our page plan. The scale notation should therefore he considered if a chart seems too small to be read easily. It may be advisable in some instances to use a readmit ((lass.

Color has been introduced on many charts in which the original was black and white. If this has resulted in an accentuation of a part of the chart not intended by the producers, we hope they will understand our difficulty, since enough charts with color were not available.

In our attempt to secure a book of about 500 pages, we found that by printing 32 pages on one 25" x 38" sheet of paper -- 16 pages on each side -- we could secure a book of 512 pages with a 6' x 9" page. There would be 16 such sheets.

By printing color on one side of each of these 16 sheets, there would be two pages of color alternating with two pages of black print. In order to have more than one color on several color forms. 24 colorplates were distributed throughout 16 forms. One form, the color form of the 14th sheet (pages 417 to 448) has all four colors. The color form of the 3rd sheet (pages 65 to 96) has three colors. All the others have either one or two colors.