ILLUSTRATIONS 
PL.ATE 1 
Representative cultures of the final comparative series, at the end of the 
culture period. 
Fig. 1. Four-salt type A, T1R2S2 (0.04 atmosphere). 
2. Four-salt type A, T2R1S1 (0.08 atmosphere). 
3. Four-salt type A, T2R2S2 (0.08 atmosphere). 
4. Four-salt type B, T2R1S2 (0.08 atmosphere). 
5. Four-salt type B, T1R2S1 (0.04 atmosphere). 
6. Three-salt type I (molecular proportions, increments of one-seventh 
R2S1 (0.00217 gram-molecule per liter, or 0.1 atmosphere). 
7. Three-salt type I (osmotic proportions, increments of one-tenth) 
R5S2 (0.1 atmosphere). 
8. Same as 7, but total concentration, 1.75 atmospheres. 
TEXT FIGURES 
Fig. 1. Diagram, showing relative values of top length for series 4, with 
3-salt solution type I (increments of one-seventh, total concentra- 
tion of 0.0061 gram-molecules per liter or 0.23 atmosphere). 
Lightly shaded area includes best-balanced sets of salt propor- 
tions; heavily shaded area includes poorest sets. 
2. Diagram, showing relative values of root length for series 4, with 
3-salt solution type I (increments of one-seventh, total concen- 
tration of 0.0061 gram-molecule per liter or 0.23 atmosphere). 
3. Diagrams, showing good and poor sets of salt proportions for four 
plant forms. 
4. Diagram, showing top-yield values for the thirty-five different 
sets of salt proportions, with low-medium total concentration. 
5. Diagram, showing root-yield values for the thirty-five different sets 
of salt proportions, with low-medium total concentration. 
6. Diagram, showing top-yield values for the thirty-five different sets 
of salt proportions, with high-medium total concentration. 
7. Diagram, showing root-yield values for the thirty-five different sets 
of salt proportions, with high-medium total concentration. 
8. Diagram, showing distribution of lov/, medium, and high green- 
weight values for series 16 and 19 combined. 
9. Diagram, showing distribution of low, medium, and high water- 
absorption values for series 16 and 19. 
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