t&dk 8. Bladder about â qudrter blown, and tyèd the Weel
ofdfevèryclofe ; &s he âfcëôded the Hill thô Cylinders of
thé Atmofphere! growing fhorter, and confeqttently pref-
fing lêfs upon the fidês of the Blctddçr, the internal jûïr
expanded it felf >lb far, that when he came to the-Top of
the Mountain itWas fully blown, and as he defeended the
Hill againj gradually fubfided, fo that at his chining to the
Bottom it wax but a quarter blowh aW at firR^fiptf^mch *
Phænomenon the Elafticity, hr Spring of the j4ir, is mani-
feftly evident.
At Norton in Chejbirythere is a remarkable Echo, Where
at about 60 Yards diftant from the Hall Staffs,- the found
of a Flute can fcarce he difeern’d, but may be heard exactly
in an oppofite Gate about go Yards From the Pkce ahove-
mentioh’d; but moXrhgfbme Six Yards fortherf in a direét
line towards the oppofite Gate, the Sound then vanifhes
Rom the laid Gate, but may then be very clearly heard
from the Plhöb -Whöfë'the^ inftmmenf'rïa^fbündéfij^ The
Sound is doubtlefs reverberated from the firft Gate-houfe,
and then repercUfled again by t1fe oppofite Gafe-houfe, and
forms a Triangle, as near as I cou’d think, by the oppofite
and parallel Stations : l obferv’d by diftinguifhing the found
in this, the fphète- of Adfcivity in PereëpbiinP is evident,
and cannot be more aptly compar’d to any thing, than that
of Sight ; in which to have a true Idea S i Gfejedt; a due
diftanee is neceflàry, both as to Proximity and Remotenefs,
otherwife the Objedt is not adequately difcerU’d;^ aowernay
observe by holding any Objedt too near,- or too remote'
from the 'Organ.
To thefe may be added an Experiment no lefs diverting,
fixnn Two -Chymical Preparations, e. g. From Spirit of
MüirWhorn Î and Elixir of F'itriolj prepared by Eigam.
Open Two diftindfc Vials of thefe, neither of them will
emit any vifible Efflmia ; but by bringing the Glares near
to each other, you may then perceive a continu’d Cloud
hang Over them. I do not remember the like Phænomenon
to
to by q bfetvdfeom any other Two Liquors in diftindt Vials*
Wbifih ^periment lp^y dqmthftrate to us, the ftrange Pro-»
penhty there is in.Matter to feparate of unite; but it is
mofli probable* the LVolatile Afisaliousi Particles of the
and the Volatile Acids of the Elixir, even in
the Air, -byAheif Points and Pores united, by their mag-»
nitude become vifibfe, which before coil’d not be difcera’d
feparately : And thisslithink: isthe hrft/Experiment that
prefents us with a Fermentation hovering in the; Air, and
like wife demonftrates to' us abundantly* how Saline Par-
tifilesmay^anddo invifibly float in the Atmofphere; but
l ^tfe mndifc^rniMe ,: till concretidg. into Mslewlte, and a-
j dapt§d to the Figures of the feveral Pores of their diftin&
; Qres* Where they form j? this granted, ir will
be no difficult matter to account fer Mjetiafimctii of Sallf}
and may likewife hint to ns, how by ftth Concretions of
Saline Par tides, Diflempers are frequently caufed in Anifc
mal%; I have in feme PerfonsJisi aCOtd f>i3Etampers, order’d
the Patient to hold his Finger upon a; t'herMonieter, or
final! Glafs Tube, impleted with Spirit tit fEine j but perceiv’d
nothing farther r e to k b l^ than a quick and com*
fiderable Afcent, which I might hayh bXpedted-from the
degree of Heat in any other Body.
Thefe following Obfervatioiis of the EdrofnHer j Were f|
Communicated very lately to me, by Mr. TrideMx near
Ludgate-hiffl in Eondon, which take as YolOWsi ft is
, dent, that the Afcent Of ^BaromelW , isin
a great meafure. -made by qWefRlfeY hot whether that
preflure be from the circumambient Atiftofpherc, upon the
| mpemciss of the Mercury contain’d in the Glafi, in which
ja Tub#containing Mercmy is’ immem’d j or from the va-
BousElafticities-of the r that iffipUm thO f@p of the
Tube, ’m the next Thing that M ! P oUF EhqMfy. For
*** Wtlid tkfkot- Ifyptihefls,
f i l »wbfeqnent Experiments ibeih to dOitiOttfeato ft M
[hrlt, Let there be' immers’d' a MercurUl Tube-, in another
Ek of