C 273 ) ^ 
^lliall be ufeful every where eire,.and particularly to fiBdthe Lon^' 
gkudes both by Sea and Land, foraroiuch as their oiovement is re- 
gulated by a principle of Equality , as that of Pendulum's is 
Cycloid , and that no kind of carriage lliall be able to flop 
theni. 
The fecret of the Invention confifts in a Spiral Spring, faftned 
by its innermoft end to the Axis or Arbre of a poifed Balance 
("bigger and heavier then is ufualj which turns upon its pi» 
vots ; and by its other end to a piece that is faft to the watch- 
plate. Which fpring, when the mllance-wheel is once fet ago- 
ing, alrernatly fliuts and opens it^ fpires, and with the fnial help 
k hath from the watch-wheels, keeps up the motion of the Ballance- 
wheel, fo as that, though it turn more or lefs, the times of its re- 
ciprocations are always equal to one another. 
In Fig.4.Tab.T. the upper plate of theWatch is A B : TheCircu- 
lar Batlance-wheel, C D, of which the Arbre is E F : • TheSpring 
turned fpirally, G H M, faftned to the Arbre of the Bal lance-- whee! 
inM, and tothepiecethat isfafttothe Watch-plate, inG; alUhe 
fpires or windings of the Spring being free without touching any 
thing. ISTCXP istheCock, in which one of the pivots of the 
Ballance ^'iheel turns 5 RS is one of the indented Wheels of the 
V/atch^ having a ba) lancing motion, which the Ballance-Wheel of 
rencontre gives to ir» And this Wheel RS catches in the pi- 
nion.Tj which holds on the Arbre of theBallance, of which by 
this means the motion is entertained as much as is neceffary. 
An Extraft of a Letter, lately written to thePublifiier byDfa , 
Swammerdam^ of an unufual Rupture of the Mefentery. 
C^U M advos iret CL Dn qMreret ex me analiquid Ute^ 
J rammfer ipfmjad Te curare ^ueUem^ nec faf pete ret alludfcri' 
hendiargumenturr^^ pr^fe^tcmcafam rariorem ^^obis communicure've'^ 
lui. 
Figure adjeota repr^fentat Convohulum fve Affectum Jlkcum le- 
thdemy exruptura ^ circumvolutiom Mefenterii tntefiim confirm- 
gentU^oitum, 
J A. htefl/mm Ileum ^chylo.fl^tu ^hgeflis mirum V. Tab, 2 , 
in modum turgens atq\ inflammatum. 
BB, Mefentermm diruptum , confiituens vwcuhm qnoddam^ 
inteflmafuneflofato circumligms. CQ 
