To the Reader, 

 tie TraB : I have alfi amended 

 fame considerable faults , occa- 

 sioned by the mifplacing of fi- 

 veral Letters in the explication 

 of the Scheme of the Boxes and 

 Houfi? I have taken away all, 

 which I judged fiperfluous, that 

 fi yon need be troubled with no- 

 things but what is neceffary, for 

 your better under fi an ding and 

 praUiflng this new Inventi- 

 on : Alh which I have done - 

 for the satkfa&ion of all con- 

 cerned, and for the advance- 

 ment of this fi public/^ a good, 

 that it may be pra&ifed not on- 

 ly by the Rich, but even by the 

 pooreji countryman. 

 j I will ma\e no Apology either 

 for the ftyle 9 or any other de- 

 feats, which may be obvious to. 

 the Critical Reader 5 The ap- 

 probation of the Royal Society, 

 and of the moji famous Fee- 

 Mafiers in England 5 The ecu- 

 A 4 lar 



