x CONTENTS 



PAGES 



Familiar association of features Possible mistakes in 

 grading Unimportance of hair strength Uniformity 

 Convolutions of the lint Keversal of convolutions 

 Uniformity and pitch of convolutions Pitch and hair 

 strength Uniformity Perfect cotton unattainable 

 Ubiquity of uniformity 124-152 



CHAPTER VI 



THE DEVELOPMENT OF COTTON-GROWING 



Introductory Science Finance Mechanical pickers The 

 failure of cotton The behaviour of a crop Experi- 

 mental trials Small plot trials Errors of plot- com- 

 parison Need for accurate results The handling of 

 small plots Utility of accurate results Uncertainty 

 of subjective opinionsElimination of accidents 

 Crop records Boiling records Flowering records 

 Flowers and the yield Use of crop records Variety 

 testing Pure-strain production -Development of 

 pure-strain breeding Spinner's testing-house Fifty 

 years ago - 153-170 



APPENDIX I 



METHODS OF INVESTIGATION 



Crop records Cytological methods Preparation of dated 

 samples Continuity of record Ginning Out-turn 

 Seed weight Lint length (single-fibre measurements, 

 pulling, combed seed-cotton) Examination of the lint 

 (diameter, weight, strength) Hair strength -O'Neill, 

 Hughes Automatic tester Impact testing Sampling 

 Grading Limitations of so-called "scientific 

 methods" 171-195 



APPENDIX II 



TABLES OF STATISTICAL DATA 



Dated flowers, 1912: Tables I. and II. Daily pickings, 1913: 



Tables III. and IV. (with footnotes) 10B-210 



LIST OF REFERENCES - - 211-214 



INDEX - - - 215-221 



