588 
THE GARDENERS’ CHRONICLE AND AGRICULTURAL GAZETTE, 
[JUNE 4, 1964, 
„or the load, or the 
bet 
Q 
"n 
Q uw 
ft 
it—like, for usn that 
by the -string—it is subjected to 
a load or "tes transverse to its len gth. 
Very good wrought iron bars will | stand as much 
as 30 tons to the square inch, while some will 
0 tons under à tensile stress. 
: er e] he 
k mount which will infinitely 
vary, with the distane between the > suppor orts, the 
shape of the beam 
a piece of cena ae be taken, rand stretehed | t Ns 
wn ee te 
the I 
| wrought iron, appears i ede been first t pointes me 
out in a paper on the testíng of oe he 
a few weeks ago before the Socie dis. 
The o be eit P 
manifold. In the freta te 
HOMAS 
ve "hat this is m3 corr ect, 
rought iron is set] injured b 
o four time 
ich, go to pro 
the tensile gp of w 
tion Ter 
If we sree E a or pull Tus jadi ra bi 
e elongates sin the direction of its 
took place. 
a d, it of cours 
ngth. 
i 
Th 
is also clear. 
in’ TOS 
og 
Its pores at last get more or less closed up. | 
suddenly 
beyond a certain limit. It is rendered harder an 
more brittle. A rod of glass 12 inch in diameter r| 
will stand the pue, gradually applied load 
meter, But the glass aid 
iron bar 1 inch in e 
mero per-centage of 
hat, l bef “the 
ud je 7 at eyer bo fo orgotte rk bo, what engineers | be shivered to Cabe pn by a blow. "The peculiar | from its true 
dant et ‘That to say, it|effect of tho lateral contraction in hardening GUERRE 8 tium bill. P. 
e sse not merely ianari but also - 
permanent e is the case 1 won RURAL COTTAGES. 
such an elastic ma our piece of india 
; ; THE Sari are extracts from Mr. Bailey Denton’s lecture read May 11, before the Society of Arts, We 
bber, If SERN E far, igi ag m d take them o m the report in the Society’s Journal—and we have to thank Mr, Denton for the use ofthe 
vU siginal sh g 2m k: oes : 4 ew end engravin ets wich they are illustrated. OC a eae B 
$ r : and walks(if any) shou avi 
manent set; itis rather longer than before bein MN BA pe "ped MU E pec preservo cleanliness thin the jw e led, s0 28 to 
stretched. With t 12 tons the These details of accommodation shortly supply tho sanitary 
and this set will go on 
ken. Under 
p 
i phe dimensions of space :— 
Height oms, 8 —À I between floor and 
ceiling of meer’ Toons, 7 feet 6 
Xiwus pe 
wil now consider how far the rules generally 
| the vary nditions of the ; 
lapel on sanitary grounds may be áp to meet 
He» 160 f RP sontene RA 44 abourer, and thereby 
pressure the bar will take a perma nt set at secure more extended comme ls ice 
15 tons to the square inch. This tensile **limit Urp Bytes y that in iro tà 
of elasticity," as it is termed by engineers, will mew M Stas Area, 120 n. x — Ls 5 d: mE x 2 m vit piper & oy that 
3 1 QUE. >- fuisses map 6 t. | three 'O0: o! n t the possession of this advan- 
vary for diff ed pq ml wrought qm M rom 10 il MD REINO 600 ft. | tage is» indue cule to adjust io ARMEN 
to 12, and to n the squa entilation which will dio these spaces — is | condition c ory village populations, "thas it becomes us to consider 
» NE ar Me having à fre. place and window vse with | whether we are not straining too much after one character of 
ot 
A fall consideration of this “limit of esti 
of the ll su 
is rtance. -— 
achines, po ea bridges, roofs, &e., ha are 
bail u upon the assumption of E. existence, Tha 
, each € inch of the iron - loaded 
orto y one- aeta ive it rma- 
rede erae this ia 6 tons to the square | act 
ch. jd boiler, mac iron plate | wood 
nt wdül stand 24 tons to the square inch before 
nly und 
may 0 ergo 3 tons to the square iuc 
In this case a complieated train of both mechanical 
d ch l f t lly striving to break 
the door entering directly from the porc ita pn or stair welling, "while there are others which —— attention, 
Practically, = minute cepe ES the art of veninton are and which if €" received it would s ore perfect 
fo! inapplicable, these n iderata, each | fulfilment of ow inten sen 
hin the pd cim 
ings The argument u d in favour of building no other than 
"om wit three pease ms is, that there already exist 
in, deficient ont that it 
sho! d pro dcr 
having a command of a fri aes pm of S through it. 
seul! avi 
snk for was 
feats 
bien of 
half the ante er ined go a 
d te airaa 
a The Deleted. It is found, in fact, to requiro the 
its bonds. 
t be reme mbered that the ultimate 
mata me Bain is sufficient] tly simple 
gradual load has increased from 
d by rere petitis 
n acting up the br 
b 
ements, which 
currency amongst 
i 
2 
er | certain 
Be the Roo lt wi "n be by any refinements in the 
thai 
shy 
en & e 
positive ébtramislon to remo 
hovel into a ^ sized co! 
a tidy w 
more 
f 
R. srpek OTTAGES. E" 
Kem J is admitted on all hands that the rent duo for 
the, great diffculty y heit aas x contend d Ku must always 
structure of equal di must Sr gf 
si 
4 
h 
w structure, The 
ach is explained wm "E w 
equally os to work tA i cou few or oe haps ge is 
bet end o pay y for in <n the —— 
with ols 4 as ily. For ae oo a laboure: 
with a ja family pest ud n pet with ‘oe bed- 
ms, he - E quent], om to crowd his family into two 
ms out o! ree, and to let the third. 
"m he ns to ught are not the reduction of 
Space in the required roo in the dimensions of walls 
— 
ay for it, it Semana ians that we must 
tom 1 
crear of providing am Uang 
to be the better y ot ee — E 
ke of Bedford's Cottages.—The 
of “Belford in 1849, p ublished, in ae 
Royal Agricultural Society of Hogan 
E: of the several kinds o 
| He had on his Belin aur i ber 
is surveyor t 
cottages, suitable for families of different sizes, s 
and in blocks, and some most excellent designs : 
cottages appears 
nor 
and t in the establishment of a better and more 
dwellings to the cireumstances 
the real 
mode of eee - ie in — substitution of con 
ick walls, no: - ls for solid ones,” 
v 
I et rq Rec erg EN e n th eir 
dwellings and this gerne Moser Bayes e ei TIE 
E specimen of cottage, bw ee ME found in the tenth volue of she Agricultural 
built woode 
for tho Bart of i e c Lage sicut above JRobeon, | Journal, Among them will be found the following P 
