1. A laboratory comparison of the toxicity as a contact poison of DDT with nicotine, derris products and the pyrethrins
  2. The Effect of Medium on the Toxicity of DDT to Aphids
  3. Annona species as insecticides
  4. LXV On the cocoons of some British Lumbricidae
  5. LIX.—Some notes on reproduction in British earthworms
  6. LVII.—A method of studying the burrowing activities of earthworms
  7. XLVI.—On some earthworms from Iowa, including a description of a new species
  8. Differentiation of the Vegetative and Sporogenous Phases of the Actinomycetes: 2. Factors affecting the Development of the Aerial Mycelium
  9. Differentiation of the Vegetative and Sporogenous Phases of the Actinomycetes: 1. The Lipid Nature of the Outer Wall of the Aerial Mycelium
  10. The influence of rainfall on the yield and botanical composition of permanent grass at Rothamsted
  11. The easily reducible manganese of soils
  12. An analysis of captures of Aphididae (Hemiptera) in a light trap
  13. On the ecology of beetles of the genus Agriotes with special reference to A. obscurus
  14. Protective antigens isolated from Br. Arbotus
  15. Methods of Deferred Sentencing in Testing the Fraction Defective of a Continuous Output
  16. The determination of the factor for pyrethrin 1 in the mercury method
  17. Factors affecting the loss of yield of sugar beet caused by beet yellows virus. II. Nutrition and variety
  18. Soils and fertilizers
  19. Soils and health - Advancement of science - presidential address to Section M (Agriculture) of the British Association
  20. Rothamsted Experimental Station
  21. The logarithmic series and its application to biological problems
  22. The logarithmic series and the comparison of island floras
  23. The field of research in preventive entomology
  24. The generic relations of species in small ecological communities
  25. The use of salt for sugar beet
  26. The essential nature of certain minor elements for plant nutrition. II
  27. Some properties of potato virus x in leaf extracts made in different ways
  28. Primula obconica, a carrier of tobacco necrosis viruses
  29. The influence of light intensity on the susceptibility of plants to certain viruses
  30. The behaviour of some naturally occurring strains of potato virus y
  31. Technique of the analysis of variance
  32. Analysis of data from all possible reciprocal crosses between a set of parental lines
  33. Evaporation in nature
  34. A note on differential responses in blocks
  35. The production of dermatitis by pyrethrum and attempts to produce a non-irritant extract