Of OXFORDSHIRE. IS 
qn^i^^t and ftill) at leaft nrncj if not tenor eleven tinies, but fo 
thick and clofe, that even a difyllMe breeds a confufion : Where , 
by the way if it be objeded, that (the whole wall being but 40 
yards, or 120 foot long) according to the afore-limited diftanc€ 
for Echo's^ a monofjlUbk (hould not be returned above once at 
moft t It is to be noted, that thefe Echo's made by a double re^ 
fle^lion, begin (quite contrary to all others) at the remoteft ob)e6l 
from the corpus fonorum^ which in as many as I have yet feen, is 
a diftindl wall, falling on that ; on which the reft of the objects 
are, in right angles ; and this objeft it is, that firft terminates 
the voice, clap, or ftamp ; and from which, by refledion, they 
ftejct ftrike the ultimate fecondary objed:, then the penultimate and 
antepenultimate'^ which, though nearer to the corpus fcnorum in 
refpeft of the fituation of the objefts, yet are ftill further oft' 
in refped of the voice, or other founds motion : whence it 
comes to pafs, that the neareft objed to th^ corpi^ fonorum is laft 
ftricken, and therefore repeats a fyllable as well as any of the 
reft, becaufe indeed in that refpeft the furtheft from it. 
29. After the voice or clap has ftricken thefe fecondary ob- 
jeds, by way of acceffion as it were to the corpus fonorum^ it is 
carryed again by a fecond reficdion away from it toward the 
primary objed, and fomtimes over it, as it appears to be in this 
Echo at Heddington^ where the found feems as it were fomwhat 
refrafted, for it is heard quite out of the place, as is evident to 
any one that ftands in the North-ea^ corner of the Garden and 
fpeaks We^mrds^ who will hezr the Echo rather in the Hortyard 
on the other fide the wall, than in the Garden, w'hich I take 
rtioft certainly to be occafioned by this fecond reflddion ; for let 
any one that fufpeds the Echo to be really in the Hortyard, and 
not in the Garden, go but into it, and heftiall there find no fuch 
matter as an Eci^o. All which, is more fenfibly explained m 
Tab, I . Fig. 4. where 
a. i6 the place of the fpeaker or maker of any other found. 
b. the primary ohje£i firji terminating the founds andrefleHing 
it on the Peers of the other wall, 
c c c c c c. the Peers between every two Niches that receive the 
found refleSied from the primary objeSi and make the Echo, 
d d d d d d. the lines wherein the voice k carryed bacKagain 0- 
ver the primary obje^^ whereby the Echo appears out of its 
place. But 
