Quality 



The quality of your printed illustration reflects the 

 quality of your original art. Although reproduction nnay 

 reduce some small imperfections, it may magnify others. 

 For this reason, you should examine your original drawings 

 critically. Submit originals for printing upon request; the 

 photocopies you send in with your manuscript are for the 

 use of reviewers. 



Only line drawings made with the best materials repro- 

 duce well. Always use a waterproof India ink with a good 

 black color and a good quality tracing cloth, tracing paper, 

 white paper, or acetate. Extreme care must be taken when 

 acetate is used. It is especially susceptible to finger prints 

 and is easily charged with static electricity that attracts 

 lint and dirt particles to the illustration. 



Lettering and symbols (but not figure legends) are placed 

 directly on the drawings. Pasted tabs may come loose or 

 slip and cause needless delay and work, necessitating re- 

 turn of the illustration to the author for correction. 



Scales. "The scale used will greatly affect the quality of 

 your graphs and charts. Whether a chart will be easy to 

 follow or crowded and hard to read is determined by the 

 scale you select (figs. 4 and 5). 



Three basic rules govern the selection of scales for 

 graphs and charts: 



(1) The scales should permit an accuracy of reading 

 commensurate with the purpose of the illustration; 



(2) They should keep the chart or graph within a size 

 consistent with the data; 



(3) They should produce a curve with a msiximum slope 

 of about 45 degrees. 



Figure 4. -The curves in this graph fall too close together and the potterns used 

 ore not easily distinguished. Rescaling would greatly improve this graph, as 

 shown in figure 5. 



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