There are 4 theories about why people never smiled in old photos, and they explain a lot about photography and culture.
It doesn't look exciting... a small cardboard box covered in leatherette - but the Brownie may be the most important camera ever made.
The Digital Public Library of America brings together the riches of America’s libraries, archives, and museums, and makes them freely available to the world.
Before people were saying "cheese" to smile for cameras, early photographers chose a much different type of food for subjects to say.
The Serious and the Smirk: The Smile in Portraiture – The Public Domain Review
Frank A. Brownell at Historic Camera
The 1st Brownie Camera | The Brownie Camera Guy's Blog
Frank A. Brownell kodak brownie - Google Search
Information about original f/Stops and Shutter Speeds of Kodak Box Cameras is here. The Brownie Camera Page is dedicated to past, present, and future Brownie photographers everywhere.