My brother hipped me to these the other day. WIRED published these recently and here they are online. Apparently these daguerreotypes belong to the library and they are a pretty incredible view at our city a long long time ago. For those wondering what exactly a daguerreotype is, I constacted Wikipedia:
The image in a Daguerreotype is formed by the amalgam, or combination, of mercury and silver. Mercury vapor from a pool of heated mercury is used to develop the plate that consists of a copper plate with a thin coating of silver rolled in contact that has previously been sensitised to light with iodine vapour so as to form silver iodide crystals on the silver surface of the plate.
So now you know. Check ’em out though, they are pretty phenomenal pictures of our city in its infancy.