This is straightforward detective work for most images, but very early photographs can be misleading.

Numerous types of photographs appeared and then went out of favor throughout th 1800s.

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This uses CSS "behaviors", a custom Microsoft extension to CSS.

As such, it will not affect any other browsers like Mozilla and Opera which already implement good PNG support.

The vast majority of antique photographs taken in the 19th century were one of the following types.

CLICK ON EACH type to see detailed characteristics.→ Zum Blog "Wars Das" Es gibt Wochen, in denen muss man Bilanz ziehen.Die Bilanz eines Jahres, in dem sich auch in dieser kleinen Kolumne viele Lieblinge ganz groß hervorgetan haben.It requires only one line in your CSS file, and no changes to your website HTML. Open "iepngfix.html" in a browser; step by step instructions are within.IE5.5 PNG Alpha Fix (c) 2004-2009 Angus Turnbull is licensed under the GNU LGPL, version 2.1 or later. More downloads are available at the Git repository. If you're using this, please consider making a donation to support its development.So, the first step in narrowing the possible date for your old photograph is to be able to identify 19th century photographs to determine what type you have.