You can find many old magazine issues and books from the 19th century to the 21st on Google Books
CHRONICLING AMERICA Digitized historic American newspapers, from the Library of Congress
WISHBOOK Christmas catalogs from Sears, Spiegels, Lord & Taylor and more, from 1933 to 1988
OLD MAGAZINE ARTICLES Vintage 20th c articles on various subjects
FREE NEWSPAPER ARCHIVES
MORE FREE NEWSPAPER ARCHIVES Includes links to European newspaper archives
TIME MAGAZINE ARCHIVES search the issues of Time from 1923 to the present day. You can also browse by COVERS --- too bad it's no longer free.
WIKIPEDIA LIST OF ONLINE NEWSPAPER ARCHIVES some you can search or browse for free
THE BROOKLYN EAGLE 1841-1902 The entire newspaper is online.
THE 19TH C. IN PRINT from the Library of Congress. An assortment of periodicals online. MANUFACTURER AND BUILDER has plans for houses in many of its issues. I found selecting the option of “volumes for this periodical”, the simplest way to browse through the pages.
UNIVERSITY OF MICHIGAN JOURNAL COLLECTION journals from 1831 to 1901
GODEY'S LADY'S BOOK some images from the pages of Godey's and other sources.
HARPERS WEEKLY Read complete issues from 1861-1865.
MAKING OF AMERICA, Cornell University digitized books and journals
HARPER'S BAZAR Read the complete Nov. 2, 1867 issue online.