PART 1. 
9. METHODS ADOPTED TO SECURE THE PURITY OF SEED DISTRIBUTED 
FOR SOWING PURPOSES. 
(Paper by H. C. Sampson, Empire Cotton Growing 
Corporation. T.C.(C).Cot.6.) 
(See page 144.) 
8. ‘“* Mass’ METHODS FOR MAINTAINING THE QUALITY OF COTTON 
‘SEED. 
(Paper by the Agricultural Department, Tanganyika 
Territory. T.C.(C).Cot.9.) 
(See page 152.) 
*  INTBRCHANGE OF VARIETIES AND PURENESS OF STRAIN OF COTTON 
FOR "TRIAL AND OBSERVATION IN VARIOUS AFRICAN TERRITORIES. 
(Paper by the Agricultural Department, Southern 
Rhodesia.) 
(See page 144.) 
5. THE CONTROL OF (JINNERIES, WITH SPECIAL REFERENCE TO THE 
SPREAD OF DISEASE. 
(Paper by H. C. Sampson, Empire Cotton Growing 
Corporation. T.C.(C).Cot.7.) 
(See page 183.) 
Note.—The Agricultural Department, Belgian ‘Congo, desire 
information on methods of control of Cotton ‘Ginneries. 
6. YIELD IMPROVEMENT BY MEANS OF FIELD EXPERIMENTS. 
(To be raised by the Agricultural Department, Uganda.) 
(See page 144.) 
7. A PROMISING SPECIES OF WILD CcrroN IN THE MOZAMBIQUE 
Company's TERRITORY. 
(Paper by Baron Surcouf of the Mozambique Company’s 
Territory. T.C.(C).Cot.13.) 
(See page 156.) 
8. Native CcrroN INDUSTRY IN THE TERRITORY OF THE MOZAMBIQUE 
COMPANY. 
(Paper by Senhor L. de Sa Pereira, Cotton Expert of 
the Mozambique Company. T.C.(C).Cot.14.) 
(See page 137.) 
CATEGORY 1V. 
ENTOMOLOGY AND MYCQLQGY. 
BIOLOGICAL CONTROL OF INSECT PESTS, WITH PARTICULAR 
REFERENCE TO THE CONTROL OF THE coMMON CoFFEE MEALY Bua 
in Kenya CoLoNY. 
(Paper by T. W. Kirkpatrick, Assistant Entomologist, 
Kenya. T.C.(C)E. & M.2.) 
(See page 184.) 
9. SOME FACTORS INFLUENCING THE OCCURRENCE AND DISTRIBUTION 
oF PLANT pIsrASES IN KENYA. 
(Paper by J. McDonald, Mycologist, Kenya. 
T.C.(C)E. & M.3.) 
(See page 214.) 
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