( 2 34 > 
Cum poftea Mala five Pyra Cydonia permattr- 
ruiflent, quafdam etiam Mali Cydonij particulas ad 
Microfcopium applicavi ; & Lanuginem, qua? ex Malo 
Cydonio exhalatur, neque Lanugini Mali Perfici Copia 
cedit, delineandam curavi ; qua? omnia in leone 4 de- 
fignata vid.es per HIKLMNO. Ubi H I N O 
perparva eft portio Mali Corticifque Cydonij , per 
IKLMN Lanugo ex Malis Cydoniis exfudans in- 
dicatur. Qu# Lanugo, licet in Cydoniis longiorquam 
inPerficis, nontamen in illis erigitur, ficut in iftis ; fed 
crifpando fibiinvicem implecftitur. 
— ■ 
X. Remarks on fome Attempts made towards a 
perpetual Motion ^ by the Reverend Dr. Defagu- 
Iiers. F. R. S. 
T H E Wheel at Heffe-Cajfel , made by Monfieur Or- 
fireus and by him called a perpetual Motion, has 
of late been fo much talk’d of, on Account of its wonder* 
ful 'Phenomena, that JTgreat many People have believed 
it to be a&ually a felf-moving Engine ; and according- 
ly have attempted to imitate it as fuch. Now as a great 
deal of Time and Money is fpent in thofe Endeavours, 
I was willing ( for the Sake of thofe that try Experi- 
ments with that View ) to Ihew that the Principle, 
which moft of them go upon is falfe, and can by na 
Means produce a perpetual Motion. 
They take it for granted, that if a Weight defend- 
ing in a Wheel, at a determinate Diftaece from the 
Centre, does in its Afcent approach nearer to it ,* fuch 
a Weight 
