324 DR. L. H. GOUGH. 



Zimmermann, A. (1910). Anleitung fur die Baumwollkultur in den deutschen 

 Kolonien. Berlin, 1910. 



Insect Notes : The Difficuties of Plant Quarantine. — Agricultural News, Barbados, 



xiv, 1915. 

 The Pink Bollworm. — Agricultural News, Barbados, xv, 1916. 

 The Pink Bollworm. — Agric. News, Barbados, xvi, 1917. 

 An Illustration of the Importance of Quarantine against Injurious Insects.- — Jh 



Econ. Entom., Concord N.H., x, 1917. 

 The Pink Bollworm.— Jl. Econ. Entom., N.H., x, 1917. 



References to Works on Cotton. 



Balls, W. L. (1910). The Physiology of the Cotton Plant. A Preliminary Note.— 

 Cairo Scientific Journal, iv, 1910. 



Balls, W. L. (1910). The Effect of Seed-weight on the Field Germination of Cotton- 

 seed. — Cairo Scientific Journal, iv, 1910. 



Balls, W. L. (1911). Cotton Investigations in 1909 and 1910. — Cairo Scientific 

 Journal, v, 1911. 



Balls, W. L. (1912). The Cotton Plant in Egypt. London, 1912. 



Balls, W. L. (1915). The Development and Properties of Raw Cotton. London, 

 1915. 



Balls, W. L. (1915). Evading the Bollworm.— Near East, 1915. 



Craig, J. I. (1911). Notes on Cotton Statistics in Egypt. — L'Egypte Contemporaine,. 

 Cairo, 1911. 



Leake, H. M. (1914). Preliminary Note on the Factor controlling the Ginning 

 per cent, of Indian Cotton. — Journal of Genetics, June 1914. 



Damp in Cotton. — Official Report of the Ninth International Congress of Delegate 

 Representatives of Master Cotton-Spinners' and Manufacturers' Associations, 

 held at Scheveningen. Manchester, 1913. 



