During my research about modeling for daguerreotypes in the 19th century, I stumbled upon many interesting digital archives. However, Calisphere is, by far, my favorite. Calisphere features hundreds of different collections concerning different types of primary source images. Specifically, I found it beneficial since it displays a wide range of daguerreotypes (the primary source image for my research project). For example, it presents a collection that includes seventy-eight “cased photographs” that include daguerreotypes, ambrotypes, and tintypes (also known as ferrotypes) around the mid-1800s. This collection (entitled Cased Photographs Selected from the Collections of the California History Section of the California State Library) shows portraits of pioneers, mining scenes, and mining towns during the famous California Gold Rush of 1849. This collection of Calisphere can contribute to my research paper in two ways. First, it can allow me to analyze an extensive collection of daguerreotypes in the 19th century in order to clarify the reason behind the stern expressions. Second, it can allow me to compare old daguerreotypes to modern-day photographs to try and pinpoint when people started smiling in photographs.