G.AT E. 
e fhort of, or within the line of reft; and oe 
he peter line of Heer will alfo be 22 de 
zo min. fh re of the gate’s el oes ” 
But, however, in order “to prevent ne gate being left unfhut, 
it is advifed that a fhort poft fhould be placed at about half 
the diftance aise the pos to be _ and the fence ad- 
joining the hanging-poft, that is, eg. min, within 
‘the line of equilibrium ; fo that the git fhould not open from 
its line of faftening more than about 135 deg. which will 
an{wer every purpote 3 and the cae muft be fo ae 
that the gate fhall be perfectly upright at its line of fa 
ing.” Iti is a aed that “a gate fufpended in this man- 
ner cann en, excepting in hig! gh winds, but wi 
fhut of icfalf lone ve with an unifo rmly accelerated mo- 
tion, as might be fuppofed ; its velocity being rather in- 
— as it pafles the middle part of its femi-circular 
urfe, and retarded again as it approaches its line 
~ 
oO 
give n angle within the quadrant, and the rife in the head 
afterwards will be as the cofiie of any given angle, formed 
the gate with its line of equilibrium, in deferibing the 
the lengt 
e 
re 3 which cofine of 
the angle formed by the gate, with the line of equilibrium, 
is equal to the fine of the “complementary angle, or angle of 
ul nm ilibri 
aia: ts ae emcutary cour Thus it is evident, ae 
tho igh the rife eat a head in a firft go de 
locity of the gate’s fall, in equal eo naa of its femicir- 
cular courfe, 1 is nearly in proportion to the number s 6, 16, 26, 
tie line of rett, and the line of equilibrium, 
: the hooks 7 isc .of an inch, which is the proper ead 
ra common e. e — diftance of the line 
alg ons a two hoo ae 1g-12ths or 2-4ths o 
the ee cane to sae which are 40 
facies eae In adjufting the sar ed itis neceflary that 
the upper thimble fhould incjine 4 of ani mits centre, 
towards the hang’nz-poft, and that the ine thimble fhould 
be ferewed-into the ‘heel of the gate } of an inch out of the 
ftraight line, inclinin ng in et oppofite direction, that is from, 
inftead of tow ards, the hanging-poft, both the thimbles to- 
gether making a one of the 6-12ths of an inch, and to 
correfpond with this variation, the upper hook fhould mea- 
fure, from the centre of the pin to the — about 
half the thicknefs of the heel of the gate, as -6th inc 
— of the upper thimble will allow fafficiently for 
ee ing clear of the poft. ‘The longer hook muit 
be rors inch oa than the upper hook, and ‘muft be 
dri nto the gate-poft 1 1-6th inch out of the perpendi- 
se line of the perforated part of the gate-poft, in which 
the hooks are to be received ; as the lower thimble muft alfo 
i a Alas thimble in length 1 2-4ths inch, fuppofing. 
e gate to be a Gauge cee parallelogram ; or, at leaft, 
the rail and heel to be at right angles with each other, a 
the lower thimbles muit be extended by a wafher, to 
up the deficiency, which, however, will not at all aro 
with the velocity of the gate’s fall; becaufe the hooks are 
the centre of motion, upon which ‘all adjuftment, as to the 
gate’s fall, depends: the places of the thimbles influencing 
of t 
only the upright fonton e gate when oo - The 
numbers of 8-12ths rather furpafs, it is obferved, the pre-« 
cife meafure of their refpective fides of the tangle, but are 
nearer to the truth in calculation, than any w workman could 
attain in applying thefe directions ; for, in acieee ari do 
ae eed their true meafure fo much as 1-24th of an inch, 
and diaeh , in the the clear {um of £ inch is affumed 
° 
fe 
5 
° 
5 
wi 
‘ ey t than 4o inches diftant from ck “other, 
Z inch, on fas contrary, would be rather too little for the 
jut propo 
It is pontidercd as certain, ‘that a {mall {pace muft be 
loft in hanging a gate, though the hooks and thimbles be 
made with the greateft exaCtnefs; for the weight of the 
ae will draw the upper thimble to bear upon the hind part 
the upper hook, will el the lower thimble againft 
the fore-part of the wer hook: this muft, however, be 
trifling where the cee are well fitte d, 
ate 
fides ia . tria a mda » and 15-12ths 
equal to 1-12th in = cs ee of 15-12ths, which is 
affumed but cay about 1- 14th inch more, as ftate above ; 
or, on the whole, ay to 1-8th inch, which is a good ge- 
nera 1e lofs in hanging a gate, and will ufu. 
haffici ent to bet the upright potition of the gate 
when fattened, wit ithout having recourfe to a wafher at the 
lower thimble. 
He ftates, awe the « velocity, as above given to the gate’s 
fall, will be commonly oe without any care of oiling 
the ara ta ; but thee of wind cannot be counteracted in 
by good apie of the hinges ; for were a ve- 
locity ne to a gate’s fall, equal to the r ‘efiftance of fo 
powerful an agent, the gate would foon want a ay from 
the conftant violence of its fhutting, and be 
mene in the ea s of a horfeman : bra when a ftron 
on be acted upon b 
of re ee ; but if paffengers 
open under fuch circum. 
ftances, there will be one fatisfaction remaining ; that is, as 
oon as the wind ceafes, the hinges muit refume their pro- 
perty, and the gates faften of themfelves.”’ 
ifferent di given for afcertaining the pro 
per pofition of the hooks, in cafes where the hinges of gates 
are more or le{s than 40 inches afunder ; in. proving the truih 
of which, « fuppofe,”’ ah he, “a gate to be 110 inches 
long, an ae it is intended to rife at the head 6 7-8ths 
inches in its femicircular courfe, from the line of reft to the 
line of eaalipeum, then as the length. of the gate is to ae 
diftan 
