GAG 
near 3 of a mile, wherice the mercury in the ar eeigel 
though it was afterwards funk t 
5346 fe and 66 feet, it came up no lower: 
the warmth of the water upon the furface, and that of tl 
air, was all that time 
Vhen the water in the bucket was become of the fame 
temperature with that on the furface of the fea, equal quan- 
tities of both were weighed and tried by t 1 hydrom: eter: 
that from below was found to be the heav "ett, and, confe- 
quently, the falteft. See Treatife on Ventilators, cart ile 
p- 122, &c. 
Dr. Hales was probably led to the conftruGtion of this 
fea-gage from an inftrument vented by Dr. Ficok, an 
defigned for fame purpofe. This confifts of a fquare 
, ana thez e 
ance of the water i. up the bucket in the 
whereby the water, whilft the bucket is defcending, hath 
free pailage through it; whereas, as foon as the bucket i is 
pala upw ards byt the line I’, the refiftance of the water to 
that motion bears the bucket downwards, and keeps it in 
the potture G, whereby the included water is kept from 
getting a and the ambient water kept from getting in. 
Phil. Pranf. N 9, p- 149, and No. 24, p. 447, or abr. 
wol. ll, p. os 
AGE, Aquio~ ncrcurial, is the name of an apparatus con- 
nr and applied, in various forms, to the 
n order to oe mine the force with whic 
they = be moi ite Let er, Plate XVI. Mifcellany, 
fg. 2. be a cylindric glafs, ¢. gr. “Of an inch diameter within, 
and eight inches long. Into this glafs is introduced ihe 
branch of a young thriving apple-tree J, about three feet 
Icng, with lateral branches; the diameter of the tranfverfe 
cut i being 3 of aninch. Having fitted the joint r to t 
tube at 7, by folding a piece of fheep’s fkin round the ftem, 
it is ented with a mixture of bees’-wax and eae 
melted together in fuch a proportion, as to make a 
clammy | e when cold, and over le cement folds a aa 
bladders are bound cea with packthread. he lower 
bein 4 of an inch diameter, and eightcen aie 
long, and in fubftance full 4 of an inch thick. Thefe tubes 
‘are cemented together at ¢ with common hard brick-duft, or 
powdered chalk cement, ‘and the joint is farther fecured with 
the cement of bees’ -Wax an turpentine, over which a wet 
e 
in 
n 
The 
s.the water was 
of it: and, therefore, the hei of the mercur 
could aily be proportional to the excefs of the quantity of 
GAG 
ioe drawn off above the pened of. = air, which iffued 
of the wood. If the quantity of air, ifluing from the 
on had been equal to the quantity of ‘water SS it 
is plain that the mercury could not mife at all, becaufe there 
i nM ti in 
would be no room fe in the tube : be ine parts 
twelve of the water be imbibed by. the branch, and onl 
three fuch parts of air iffue into the tube in the fame time, 
the. mercury mutt rife near fix inches, and fo proportionably 
in other caies. Dr. Hales obferved, that the mercury rofe 
higheit, in moft cafes, when the fun was clear and warm, 
and that it fubfided three or four inches towards evening, 
but rofe again the next day as it grew w a though feldom 
fo high as at firft. Dr. Hales adapted the fize and fhape 
of the giafs a atus to a great variety of Secs of feveral 
fizes, an and of different kinds of trees, and repeated the expe- 
riment above deferibed, mutatis mutandis, ina variety of in- 
ee his Veo 
makers for meafuring and fetting 8: 
filts of a beat, tooth, fliding oe ae i. “thoulder of 
the focke 
AG Tide, is the name of an inftrument ufed for deter- 
mining the height of the tides by Mr. Bayly , in the courfe of 
a voyege towards thé fouth-pole, &c., in the Refolution and 
Adventure, in 1772, 1773, 17745 and 1 1775. 
This inftrument confilts of a tafe tube, chote internal 
diameter was feven-tenths of an inch, lafhed faft to a ten feet 
ir rod, divided into feet, inches, and quarters: this rod 
was ffene to a {trong poit fixed upright and firm in the 
water t ower end of the tube was an exceeding 
la a ao through which the w eae was ate pester In 
confeqie conftruction, the fur 
the 
the fea was two feet ; and Mr. Bayly was certain, 
that with this inftrument he could difcern a difference of one- 
tenth of an inch in the height of the tide. 
Gace, Water. See ALTITUDE and HypromMeEtTer. 
ee Weather, in Sea Langu sage. See Gacg, above. 
GAGE plates in Geography, an ifland in Upper Canada, in 
he c y of Ontario, vying of Singfton 1 in lake Ontario, 
ae "Ameri pa 
AGE’S Town, a ee ent in Su alg) y county, New 
Bru oe rick, on the lands amounting t co acres, on 
the weft fide of John’s river on the nor ne fore of the bay 
of Fundy. 
GAGER de Ley. See WaceEr o ke 
eae eg UGER. 
GAG AUGIN 
GAGES. in Geography, a town of F race i in the depart- 
oma 
in Geomerr ‘ye See ica CG 
ment of the Aveiron; tix miles N. I. of Rh 
GAGLI ARDA, tal. GAIL BE, I'r. 
licfome, ‘and riotous a — which, i - modern 
waltz, is al alwa e time. Galliarda, guafi va- 
liarda, fr om the Latin ls ftron g> ftout, pow aun 
live 
This dance has been long out of ufe; Bale was a 
time when the galliarda was a favourite movement, not onl 
with dancers, but with performers on the vir coe as in 
plas Elizabeth’s yy irginal fe in = se Tady Nevil, 
and i 
Se 
THENIA. 
NANO, ia Geograph by, atown of Naples, i in Capita. 
nata 3 17 miles E. of Let 
GAGNETF, 
