Our contributing editor David A. Fryxell shared this genealogically cool benefit available to New York Times home delivery subscribers: The TimesMachine (I love puns!), an online archive of digital papers from 1851 to 1922.

New York Times subscribers can log into the site, pick a date and click to flip the pages of that day's edition. If you don't subscribe, you can try it out with a few sample editions.

The TimesMachine is suited to browsing, since it doesn't have a search. But anyone can search past editions of the New York Times using a different tool, the Article Archive.

The Article Archive delivers individual articles in PDF form (1851 to 1980) or text-only (1981 to present). Articles from 1851 through 1922 are free, and articles from 1981 to present are free. If your archive search returns articles dated 1923 through 1980, you’ll be asked to pay before you can download those articles.