[ ] 
efteem'd, though juftly valued by fuch as Crooked- 
nefs has unhappily deprived thereof. 
Where Crookednefs is caufed by bad Accidents, as 
Falls, breaking of Bones, or any fuch Caufes, attended 
with NegleCt; there it is to be feared no Help can 
be given. But where a Deformity of Body is owing 
to fome Defeat of Health, ill Habit of Body, or fome 
internal Caufe, I hope it is in the Power of Art and 
Care to prevent growing worfe; or with good Care 
and Endeavours, to recover intirely : For doing which, 
I hope, this Steel-yard Swing , now laid before this 
Honourable Society, will be thought an ufeful 
Invention for doing fuch Service to crooked Perfons, 
whofe Bones are tender, and capable of having their 
Form a little alter'd. 
The Body, as it is compofed of Bones with Joints,, 
cover’d with Mufeles, &c. for moving the Body, as 
Neceffity requires, fo if any of thefe Mufeles that 
are of Ufe for bending the Body forward, backward, 
downward, or raifing it upward, or for turning Part 
of the Body to the Right or Left Side, have by 111- 
nefs, want of proper Nourifhment flowing fo freely 
to one Side as the other, a carelefs way of Sitting or 
Lying, been contra&ed on one Side of the Body, 
by which the Bones are braced clofer together than 
Nature intended in this Cafe, the Hip generally 
rifes, the Shoulder on the fame Side falls lower ; the 
great Support of the Body, the Vertebra of the Back, 
are alter’d from their natural Uprightnefs to a Curve, 
and the other Side extended to too great a Length : 
Thus the Vifcera are prefled too clofe on the con- 
tracted Side, and probably hindered from perform- 
ing their due Office 5 whilfl: on the contrary Side,. 
which. 
