Signs warning library patrons of a recent "rash of crimes" have been posted at the Cabot Science Library in response to a theft that occurred earlier this week.

Harvard Police Deputy Chief Jack W. Morse said that a wallet had been stolen from the library on the 11th and that other thefts at the Cabot Science Library had been reported earlier in October.

Alan E. Erickson, Cabot librarian, said that the sign is posted regularly to remind students that these thefts occur.

"The thefts ordinarily consist of people who are careless with their possessions," said Erickson. "They are usually the source of the problem."

Even though students have reported relatively few thefts recently, Erickson said that students should know to be cautious with their personal items.

"We haven't found any cure-all," Morse said. "From the police perspective, it's education as much as we can."

Morse said that these thefts "happen all the time" and that few items are ever recovered. Theft-prevention efforts include posters warning patrons to be cautious and security officials posted at the entrance to the library.

"It's an opportunistic-type crime," Morse said. "They will take that opporunity if they find a bag left unattended."

Library officials said that thiefs usually take only small items, such as calculators, wallets and backpacks.

"It's just small items," said Student Supervisor Del R. Arvayo '93. "I guess even that isn't tolerated. Patrons are asked to be careful."

"We try to get the word out to students to pay attention," Morse said. "Where there are public places, you have crime."