Correction: January 7, 1994, Friday An article on Sunday about the number of homicides in New York City in 1993 included several incorrect figures supplied by the Police Department.

Correction: September 15, 1992, Tuesday Because of a mechanical error, an obituary of the actor Anthony Perkins yesterday included two scrambled passages in some editions.

Correction: October 1, 2000, Sunday Because of an editing error, an article last week about the military service of United States presidents included an incomplete list of those who served as officers.

Correction of these causes may include increased walks, avoiding confinement, and more interaction in the home.

Correction: March 21, 2007, Wednesday Because of an editing error, an article yesterday about a pet food recall included an erroneous phone number in some copies for a manufacturer hotline.

Correction: March 27, 1995, Monday Because of a computer error, an article yesterday about President Clinton's position on the House welfare bill included two scrambled paragraphs in some copies.

Corrections may also include the effects of the moon in offsetting the Earth's position from the center of the pair's orbit around the Sun.

Among other things, the Additions and Corrections included entirely new sections.

Correction: June 30, 2006, Friday An obituary on June 7 about the keyboard player Billy Preston included an erroneous credit.

Correction: July 29, 2006, Saturday An Op-Ed article on Thursday, about the use of climate studies, included an incorrect date.