After years of photographic research, the author explains methods of analyzing photographs historically. She outlines how you can recognize architecture, clothing, monuments, and other objects in photos; and where you can find additional help.
The usefulness of this book to anyone who has spent any time at all with family photos is pretty limited. It covers the most basic apsects of the topic: dates for evolution of the various types of photographs, a little (very litttle) on dress styles, a decent (if dated) bibliography, ideas for gathering photos from relatives, furniture clues, etc. I read it through cover to cover in a day. The 190pp. could have been condensed to about a quarter that length.
I found chapter 5 on the technical details of photograph evolution was handy and the (single!) chapter on dating photographs (chap. 3) was decent. Then again a quick google search would have yielded most of this information online.
For a basic book on the topic, I prefer Maureen Taylor's more recent Uncovering Your Ancestry through Family Photographs (Betterway, 2000).
Far more helpful are the various books on costuming and details of clothing.