Dusting Off the Old Photo Albums

A picture is worth a thousand words — so the saying goes. That's certainly true in genealogy. Photographs are among the most treasured documents for genealogists. Pictures show how your ancestors looked and what conditions they lived in. Sometimes the flip side of the photo is more important than the picture itself. On the back, you may find crucial information such as names, dates, and descriptions of places.

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Photographs are also useful as memory-joggers for your family members. Pictures can help others recollect the past and bring up long-forgotten memories. Just be forewarned — sometimes the memories are good, and sometimes they're not so good! Although you may stimulate thoughts of some great moments long ago, you may also open a can of worms when you ask grandma about a particular person in a picture. On the plus side, in the end she may give you the lowdown on not only that person but every single individual in the family who has ever made her angry — this can provide lots of genealogical leads.

You may run into several different types of photographs in your research. Knowing when certain kinds of photographs were produced can help you associate a time frame with a picture. Here are some examples:

1 Daguerreotypes: Daguerreotype photos were taken from 1839 to 1860. They required a long exposure time and were taken on silver-plated copper. The photographic image appears to change from a positive to a negative when tilted.

1 Ambrotypes: Ambrotypes used a much shorter exposure time and were produced from 1858 to 1866. The image was made on thin glass and usually had a black backing.

1 Tintypes: Tintypes were produced from 1858 to 1910. They were made on a metal sheet, and the image was often coated with a varnish. You can usually find them in a paper cover.

1 Cartes-de-visite: Cartes-de-visite were small paper prints mounted on a card. They were often bound together into a photo album. They were produced between 1858 and 1891.

1 Cabinet cards: Cabinet cards were larger versions of cartes-de-visite. They sometimes included dates on the borders of the cards. The pictures themselves were usually mounted on cardboard. They were manufactured primarily between 1865 and 1906.

1 Albumen prints: These were produced on thin pieces of paper that were coated with albumen and silver nitrate. They were usually mounted on cardboard. These prints were used between 1858 and 1910 and were the types of photographs found in cartes-de-visite and cabinet cards.

1 Stereographic cards: Stereographic cards were paired photographs that rendered a three-dimensional effect when used with a stereographic viewer. They were prevalent from 1850 to 1925.

1 Platinum prints: Platinum prints have a matte surface that appears embedded in the paper. The images were often highlighted with artistic chalk. They were produced mainly between 1880 and 1930.

1 Glass-plate negatives: Glass-plate negatives were used between 1848 and 1930. They were made from light-sensitive silver bromide immersed in gelatin.

When you deal with photographs, keep in mind that too much light or humidity can easily destroy them. For more information on preserving photographs, see Chapter 3. Also, some online resources can help you identify types of pictures. See the City Gallery Web site (www.city-gallery.com/learning/) for information about nineteenth-century photography, and visit the Everything You Ever Wanted to Know About Your Family Photographs page at genealogy.about.com/library/authors/ucmishkin1a.htm for descriptions of several types of photographs.

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