All of the Cornell Libraries, including the Engineering Library, have photocopiers that can be operated either with coins for $0.15 a copy or copy cards for $0.10 a copy. You can purchase copy cards at machines in the library. You can also go to the chemistry stock room in Baker (CD3-4), the main desk at Mann library (E4), or to the Eastern Copy Products office (5-4663) in 279 Clark Hall (D4) and purchase a copy card on a research charge account. This option is very useful if your advisor is willing to pay for copies, since it allows you to copy articles in the library without paying for them yourself. As an alternative to copiers, there are scanners available at various computer stations on both floors of the Engineering Library; by using Adobe Professional, the scanned pages can be assembled into a single PDF document.