Correspondence and papers concerning lead content of tea and the practice of packing tea in lead-lined chests, in the light of the USA Department of Agriculture restrictions on lead in foodstuffs.
Correspondence and papers on tannin content and pharmacology of tea in response to claims in advertisements for Doctors' China Tea and Brooke Bond Digestive Tea
A study of caffein and tea: psychological aspects'. Report of an investigation conducted at Fordham University, New York, for the William Esty Company and the International Tea Bureau Association