I have read that the grim expressions were from a desire not to move while the plate was exposed for several seconds. Some other possibilities:https://www.vox.com/2015/4/8/8365997/smile-old-photographs
I have read that the grim expressions were from a desire not to move while the plate was exposed for several seconds. Some other possibilities:https://www.vox.com/2015/4/8/8365997/smile-old-photographs