when the iW^^ points to a wrong time ; and this happens ei- 
ther I. Byconfent, when it folio ws the Error of the Trains 
for while the Movement goes too faft, or too flow, the i^?- 
ilex c3,vi never be right- Or 2 It is a Solitary Error in the Inrlex 
only, when the motion of the Train being duly adjufted,the 
Index it felf is not fet exadily to the ( y^v or] prefent in- 
ft ant of time on the Dial-plate 
1. Therefore, to remedy the former error which lies in 
the whole Train 1 we nick our Watches up or down (as the 
cafe requires} by turning the endiefs skrew, or by removing 
(either forward or backward) the Retinaculum or Brace of the 
fpiral fpring ; and in FeMum.^^ by gi ing the Bofs a turn or 
two upwards or downwards : but in this Movement (if fo 
be it mall happen to prove one, ) the adjuftment is readily 
perform'd without ever tampering with the Movement it 
felf > for by a skrew infertcd in the Stage at ( 5 j with the tur- 
ning of which the ^^-^^^ may be elevated or deprels'd, I af- 
firm that the Movement will go falter or flower : falter, if 
railed up i and flower, if let down. 
2. The motion of the Train being thus adjufl:ed (as near 
as may be ) to the true meafure of an hour,the error of the h- 
dex will be rc(9:ifi'd thus. I faid before, that the Index is al- 
ways to hang in the fame pofition, and therefore cannot he 
turn'dtothetime, but the time muft be brought to it; which 
is readily done by making the Horary Circle movable, and in- 
ferring ieveral fmall bofles or buttons here and there upon 
, the verge thereof whereby (with an eafy touch of the fin- 
' ger) it may be ftirr d to the right or left, as there fhall be 
occalion- 
AND thus ^r- you have the Problem -pvoposd, and nothing 
material omitted in the defcription of the intended Move- 
ment, either as to its external Itrudlure, or the manner how 
it moves in the meaforing of time, or the way how it is to be 
adjulted and reitifi d: You have heard both what it will do of 
it felf, and what is to be done with it ; in all which I affirm 
it Will fully anfwer your expedtations and mine, fbr proof 
whereof I haften to the remaining part of my difcourfe, 
which^contains, 
II. THE SOLUTION of the Problem propos^d s wherein 
I fhall endeavour to Ihow from allowed Maxims in Statics, and 
other Principles proper to theQueftion in hand both theRea- 
fons how, and the Caofes whereby this may be accomplifh'd. 
• Then, becaufe it may feem at firit view a httle furpriz- 
ing, that a circular body fliould reft (or which in tjie prefent 
cafe is all one, move fo imperceptibly flow) upon a defcend- 
ing plain, having no vifible impediment either to ftop or re- 
tard 
