A Purnell field worker is a rare sort of avis, kin, if we judge by her experiences, to pedlars, Farm Bureau workers, and country preachers. The tools of her craft are an account book, a fountain pen and an agile Ford. Her sole purpose for the year of her life during which Purnell research employs her is to secure accurate records of the income and expenditure of Iowa farmers. Her interests are bound by the cost to the farmer of food, clothing and other items of living expense and farm operating costs together with the amount of money received for produce sold, value of produce consumed by the family and the value of the fuel furnished by the farm.