Sentence:  "[T]he housekeeping accounts fall to me. I make a fairish amount of <WSD>pin money</WSD> on my poultry and some of my preserves that I send to Boston." 
Meaning of the word marked with <WSD> tags:  A relatively small sum of cash kept in one's personal possession, for routine expenses or incidental purchases; an amount of money which is not particularly significant. (from 18th c.)