Cornell University has a portion of their website dedicated to the "Making of America". Eliz Peters says that she has gleamed tons of great information and even illustrations from the online scanned pages. I is not likely that any of MOA's offerings come up in the Google Books search at this point.
Her is an example that shows one of our ancestors. Nathaniel Turner. The link goes to a scanned page of Harper's new monthly magazine, Volume 17, Issue 97, Pub.: Harper & Bros., Pub. Date: June 1858, New York, Pages: 874. Nathaniel Turner is mentioned and it even has an illustration of his sword which is on pg. 3 of the magazine. Thanks to Eliz for this.