Twice Told Tuesday - Hold Still!
While there were many reasons for our ancestors not smiling in their portraits, one look at this torture chamber might give you a clue. Even when exposures were only four or five seconds some photographic studios continued their use.
The Passing of the Head-Rest
Farewell to thee, old, time-worn Friend!
All things at last must have an end —
Your time has come to go away,
For "every dog must have his day."
You have served us, long and well;
Many secrets you could tell.
The bridal-pair, the rustic youth,
The palsied dame, the man uncouth,
From grandparent to infant small,
Your firm embrace has held them all.
Farewell!

Its disappearance has been preceded by the burnisher, a heavy, clumsy, troublesome and time-consuming implement, and no one has regretted the end of its brilliant career except the manufacturer and the dealer, both of whom profited considerably by its sale.
The cold, firm clutch of the head-support rarely, if ever, contributed to the much-sought-for pleasant expression, neither was it calculated to impart ease or grace to the pose of the sitter, and the adjustment of its burly form was often accompanied by startling and ominous sounds. Yet it managed to hold sway for more than half a century, until, with the advent of high-speed dry-plates, its use has become more and more restricted, so that only a few studios continue to recognize its utility.
Many eminent practitioners have ceased more than ten years ago to work with the head-rest, and would prefer to give up portrait-photography than to resume its use, on account of the psychological and irritating effect of the instrument upon the sitter.

On the other hand, one finds here and there a practitioner who still clings with affection to the accessory, finding it quite useful during necessarily prolonged exposures when the light is weak, or for other reasons, in which cases the support is not pressed against the head or neck of the sitter, but rather against the crown of the hat and accompanied by a remark calculated to divert the sitter's attention.
All the same, the days of the ponderous, rattling source of irritation are practically over and will soon pass into the realm of forgetfulness.
Note: You can see the stand behind the young girl in the photograph above.
Article Source:
The Passing Of The Head-Rest. Photo-Era: The American Journal of Photography. Boston: Wilfred A. French, 1909.
Photograph:
Young Girl With Head-Rest Stand. Photograph (Cabinet Card). Unknown. Privately held by the footnoteMaven, Preston, Washington. 2009.