[ * 3 
which is extended beyond its true Bounds, there is 
too much Room for them, that may give too large 
a Growth to them, or render them too lax and 
weak. From this united ill State of the Vifcera it 
is pollible that crooked Perfons are generally un- 
healthy. 
For removing this diftorted Form, and recovering a 
better, this Steel-yard Swing is propofed, as a me- 
chanical Method, for ftretching the contracted Side, 
and giving Liberty to the too-much extended Side to 
contract \ that the Sides may thereby be brought to 
their original and regular Form, by fufpending the 
crooked Perfon with Cords properly cover’d for Eafe, 
and put under each Arm, and then placed at equal 
Diftances from the Centre of the Beam. The Gravity 
of the Body will, in great Probability, immediately 
affeCt the contracted Side of the Body, fo as to put the 
Mufcles a little upon the Stretch ; and if the Cord under 
the Arm on the longeft Side of the Body be remov’d 
further from the Centre, the longeft Side will become 
a Weight continually increafing, as the Point of 
Sufpenfton is remov’d further from the Point of Mo- 
tion ; by which means the fhorteft Side muft be 
lengthen’d. Thus the Vertebra of the Back will be 
gradually brought from their irregular Form, to a per- 
pendicular ; and the Head, that probably lean’d too 
much to one Side, will rife upright. 
The Child, or crooked Perfon, may hang fufpend- 
ed much longer upon this Swing, than by the Head 
in one of the Semicircular Swings, which cannot 
extend the contracted Side in fuch manner as this 
can, as will appear by the juft Obfervation of this 
Inftrument. It may be necelfary to keep the Arms 
down. 
