404 - 
ATMOfPHEIUCAI. PHENOMENA. 
n t"'® 
pronounced in one second, or seven syllables 
conds : tiierefore, when an echo repeats seven . 
the rcdecihig object is 1 142 feet distant ; for sptii' i]-/ 
at the rate ot 1 142 feet per second, and the distan ii» 
the speaker to the reflecting object, and again 
latter to tlie former, is twice 1142 feet. 
returns fourteen syllables, the reflecting object nnis^ , 
feet distant, and soon. 
The most remarkable Echo recorded, is at 
a nobleman, within two miles of Milan, in Ital}’ a.iS’ 
lias 
buildinsr 
IS of some length in front, and has y 
jetting forward ; so that it wants only one side of 
figure. About one hundred paces before ^ [iri'’S 
small brook glides gently; and over this brook i’ piiii ■< 
forming a communication between tlie mansion 
garden. A pistol having been fired at this spob 
reiterations 
l-_- "a — — — — V t t't''' 
of the report were heard. The 
were distinct ; but in proportion as 
lU. iiw 1 
the sound 
and was answered at a greater distance, the repef'*' 
so doubled tlrat they could scarcely be counted, ^ 
dpal .sound appearing to be saluted in its passage jsli^ll, 
on either side at the same time. A pistol of a JarS®^|y if' 
having been afterwards discharged, and conseqnen^^ 
a louder report, sixty distinct reiterations were nonn 
From this e.xample it follows, that the farther tb® ^^rill 
surface is, the greater number of syllables the jy ia 
peat ; but that the sound will be enfeebled 
same proportion, until at length the syllables 
tinctly heard. On the ether hand, when the 
object is too near, the repetition of the sound 
ear, whilst the perception of the original sound 
tmues, in which case an indistinct resounding ** ja 
may be observed in empty rooms, passages, 
places, several reflections from the walls to the ^ 
from one wall to the otlier, and then to the 
with each other, and increase the indistinction 
