Item consists of five full-page advertisements for Insulin manufactured by the Boots Pure Drug Co. of Nottingham. The advertisements appeared in the General Advertiser section of the Lancet between May 10, 1924 and July 26, 1924. The series shows a reduction in price for insulin sold in Great Britain from 5£ per 5cc phial in May to 2/8 £ per 5cc phial on July 26, 1924.