[* 9 ° ] 
even the Scapula itfelf, on which it articulates; 
2 dly> In making thofe Efforts for furmounting thofe 
Obftacles, one runs the Rifquc of turning inwards the 
cartilaginous Edge of the Cavity of the Scapula , or 
the Capfula ligament o fa. The Second Defeat of the 
Ambe of Hippocrates is, that it cannot move the 
luxated Bone but from below upwards ; confequently, 
this Machine is only proper in Luxations direCtly 
downwards; and yet it is certain, that the Arm 
luxates itfelf both outwards and inwards ; and even 
it is known to all Practitioners, that Luxations for- 
ward are very frequent. Here you have a great Num- 
ber of Luxations of the Arm, where the Ambe be- 
comes ufelefs : Now, if the Ambe of Hippocrates is 
ufelefs in all Luxations outwards, and in Luxations 
inwards, which are very frequent, if it is dangerous 
in Luxations downwards, the on'y ones it is fit for, 
one muft own, that this Machine, fo much cried up 
by Hippocrates , is yet very imperfeCL 
Thefe Imperfections are real ones, but the Ad- 
vantages, which one cannot but own it has, are fo 
conftant, and fo fuperior to thofe of any other Prac- 
tice, that one naturally inclines not to part with it, 
but becomes defirous to remove thofe DefeCts it has, 
without which it would certainly be, as Hippocrates 
affures, the mod perfect of all Machines made ufe of 
in reducing a luxated Arm : For fuppofing an Ambe , 
which makes a fufficient Extenfion and Counter-ex - 
tenfion , before it leads the Bone into the Cavity, or 
at the fame time it does fo, and which alfo might 
lead it from the Right to the Left, and from the Left 
to the Right, as well as from below upwards, it is 
certain there can be no Method to be compared to 
