324 
THE GARDENERS’ CHRONICLE. 
[N° 
tir Meat is the instrument first i a ‘or these rea. 
pe it may —— ~ so = ee pion temperatare | | 
requisite m are 
the plants is much the the | same, vvhatever be ‘the vehicle em- | 
effect upon | so p’ 
Real . 8 31 oh Pa a5 - on 
constant ascent near the sides and a descent 
ae, 
Peas, t % 
ade 
the —— _ of the buildin I 
oe for the health of the plants, is a | 
‘ena 
question ry mu by the conditio on of the 
and Scarlet-runners. This is: now a ise time for thinning 
out the superfiuo us Ho _the Goose- 
ployed. 
really circulated with the _Tapidity supposed, , must of ne- 
the wien gre of temperate causes the air to change 
well as increased in size 
a 
will be evi > Bogs aie beter will be fea bende 
in seque’ 
a MB H. - 
only after it has finished its course , immediately prior t 
the re “warming. The fact i is, however, I shave little doubt 
warm, 342 paaetete them ‘within air-cases. Whenever 
NTOMO 
and there- | the ere the air r circulates so PE LOG 
fore deprived, in some measure, of that exhausting power the h a| No. VIIL—Tae Rocker Trea Mask —Of the many 
which it wi of ise possess. nee the necessity tor edi serte the air ier straw, saw- tribes of insects _ attack eg garden plants, and ape 
But whatever may be the organic consequences of air- re charcoal, or other similar non-conducting materials. the buds and flowering shoots abortive, gnd at the 
heating, itis open as a question of economy to very seri- | It appears, however, that Mr. Penn has found at his the caterpillars ¢ 
‘ous obj . For inasmuch conservatory be oe te tubes may be dispe ensed with, and then it be- small 1 moths are the most troublesome. Amongst them is 
made with an air-tight roof, the attempt to fill it with one remember attacked 
warm air may be compared to the attem fill a sieve | heated r by the air be flowering spikes of te » Hesperis matronalis, 
with water; the fiuid must be so rapidly supplied realy win Fees Sninhcis a Westies which may be | aplant celebrated in former days amongst the Dutch fio- 
to overcome the loss sustained by leakage, it is eas ints, whose flower: uifered a century back from the same 
to imagine so lai ap in the to lose There is, however, one deficiency in houses warmed | cause. Du he middle and 1]. end of last April, as 
ole of the warmed air as fast as it is supplied, and of exclusively by pipes within them, which arises 5 thus. the shoots of the Rockets advanced, it was found that th 
consequence to render ineffective the whole of the pi ibl s adhered firmly together, and t that liberated 
employed in heating i if those pipes arran, building perfectly air-tight, so there must be a continual | themselves were perforated e holes (fig. 1); 
‘within the house, radiating at once upon the soil and the | loss of warmed air to some extent at or near the roof, a forcibly opening a shoot, me.) ieayes were 
plants, it is impossible by any amount of leakage | which is replaced by cold air entering below. This cold | connected by silken t threads, a aterpillar, of 
in the roof, or indeed by the total absence of a roof, | air ha’ —- no tendency toris d tk I with its age, 
to lose the whole of the heating effect. ary | betwe perposed fluid strata being extremely aon the centre feeding ‘upon the tender leaves “(Be. 2); and 
radiation upon the h and the plants must, to at = > as ‘in this case, the heavie mae beneath, the’ 
extent, perform its office; and though th » which in | easily exist a considerable difference between the apie . This larva is is gradu ally attenuated to both extre- 
msequence in some degree warmed, will escape pee lower temperatures of a lofty house ; not, however, mities ; it has si ral, eight abdominal, and two anal 
at the defective roof, this is evidently an » incalcalably great as wi iri t ; the head is somewhat ochreous; the segments of the 
smaller mischief than when the lost air is the hottest por and which, perhaps is th body, amounting to 12, have about a dozen minute black 
tion of the pk heating agent. t defective’ t dots or warts on each, Meni * one producing a black 
The constitution of glass furnishes another very power- which are more than high en in their ts. | hair, and there is a darker ine of green down the back; 
fel For it has best shown that “his aprons is ery | when distr it can descend by 
jn fact, the relations of this valuable material with heat, reverse of that presented by nature during the days though | a silken thread, which is, as ple, spun from the mouth 
aaa wonderful adaptation to the service of man, would | it is a condition which is to some extent obviated by the | ¢ 
hav th argument and apol roa sone! | radiation of the xy upon the soil, =~ very much aggra- 
Bri Treatise. If glass had been as vated when the pipes are buried, as was frequently the 
ductor of heat as iron, we could sca’ scarcely have borne it. in case in tenes cide the paths. 
dwelli itwould| At the ho “eo ~ mse Horti een oe omc this difficulty 
have been useless for conservatories. If it permitted | is met by t eans tha used to detach the 
the passage of radiant heat at low jake it would | boiler shed rey the a st e pip con- 
have been still more disadvantageous. But while it ag UE Ye ZILA) beget 8 es Pant onic 
: mat eto 7 GY eee Cuaeet Reb 
almest entirely intercepts all return of heat from the ad y} V/ {LLL YA wallsto retain the heat, which 
jects on which those rays have fallen; it = Scant oe rap Z Y OC) © % Yj opens at one end into the 
giving ingress, but forbidd: escape. like Y ] ZY y house and at the other to the 
manner as regards the heat radiated from pipes within a ] Y Z YA & ir, and is th 
‘conservatory, a great portion of which must proceed Y Z @ © Z Y made the vehicle of introdu- 
directly | s t y Wy EEE: iy Y; ee uch fresh air in a 
as a brick wall. Of the heat which th upon the | [i= ZILLA te state of warmth as is 
own by the experiment eae! Melloni WA LULL Ha 4 requisite to repair the e 
£ th 
he. 
riod 
th 
lass ity is above 100,000 feet, and ined 
The Saree in eines contains more than 11,000 i of 
of a hes pie which (glass being a bad conductor ape pes of —— surface is pds fea of Moe a se 
a god radiator) it sent back into “the house — n the house, ined 
has time to traverse the thickness o terial. Hence This yeovsern whey “whic ch is 
we discover partly the reason of re scene which has wre iain po when pom recr with the extent of glass hit ee 
tended the attempt to warm some of the e and en- | and ern a quantity | of the contained atmosphere ¥ is, it wait of an sas ot ape, open (fig- 
tirely glass-houses which have been pti ly co} cted. | nevert hick niin: thie. pet, hk caterpillar changed 1 in a few 
The thicker glass, which, thanks to the enterprise of Mr. | of 30° eee the external temperature.— A. Ainger. days to a pale chrysalis, on = 
Chance, can now be obtained oj m moderate terms, renders SSS SSS ead, wing-sheaths, and tail, anda double bro 
- J GARDENS.—No. XVIII. own back; from the open texture of the eo Pine 
terial, while its page and flatness diminish at once| Ir frequently happens about this time that the young chrysalis was as visible as a bird in a cage. On the/thof 
ps of C , Turnips, and bic edlings are seri- | May avery snutp isabel moth emerged fro the upper 
ture formed Bo. Hornet ously injured by the numerous little snails and i slugs t that end of one of a os and the other pupe ! Kept ane 
fuel consumed ring the Ine eee winter i ie | d in every ec niger vmuit great di ae for tl ays eT 
large house erected by the Horticultural Society at less speedily checked by the application of t Ha, Lin a 
_was very much less than kad been + and | simple nal remedy which ,s is within the some tieeeiaie oe It sj a amongs st Eo roglsh co ‘ 
indeed, than any previous we € ren- is nothing more than | lectors by the name of the “3 rad Estey yo Bid 
ie. this with the less hesitation be- | a little pondered b ot lime, a slight dusting of which over | + « Rocket Tinea’ Lin 
caeee he pees sms was settled by the Com- = e purts of the garden i bt called it li - mee 
cient to acti every one with which it comes in wen at rest, = Sretakin outi its beens straight 
sn, to the property of glass, and especially of thick contact The pro x5 Lf Se ola pee. each other and 
glass, to resist the escape of radiant heat, which is there! the vening . 6 showing the 
crmatepally employed. fe thins "shorty after ey first F ipteaice it oat T geobatty | — al lengths = ir choral Sota the re the 
be necessary to wee at it. The young Celery p lants will, of t in this attitude 
showing the diapoeiion w of the pipes whic exert their perhaps, be pene in d, or applied ‘to the sides like the seat 
primary influence upon the earth and th ag ek : eoaee turn up at the 
of the plants. The air, which is heated by Contact with j dT treated he foll fr bh the French ‘hatural ye called s 
sia ye Sa a ey » £ x ~ tha Mneke’ tail The head, felers, sy and horas of 2 
the are ¢. Peo ye Be, pl toa a 3 +1. pl z ‘Ts 
to “make it pretty firm and even 5 then i lay a coating over the seine the thorax is cream-coloured; t the sides bgt 
cover this with the fine earth am inch deep. Ma ke ) streaks ; along the inferior margin is a pale § scaly the 
bist ce and prick the plants into it in rows three or ae waved and brownish, f 
four ec rope and econ- | ab! streak is also apparent at the centre, as we . a 
tinue com ich will have a great effect | line of black dots along the costal margin tower rhs i 
in peber sm wee bp until they are fit ‘final | apex; the posterior nese Pog in ing inge, is mall 
— as _ In the Ce of this very si 4 opera- | being freckled with black and bright grey, broken bys ost 
“Oni spaces of ouient the leg omen, et EN 
t, a littl f a satiny slate colour, the i kale to white, bao 
out, as A gercniarg re heed last with a long fringe e of an as hy tinge; t ie Exp % 
pies the earth to ties ned od the surface, and lea the wings is to an ge ms 
Pee: Bears about ded to, __Theonly deficiency now in the history of pera 
e deposition of her eggs, which no doubt takes ple 
moval. Another ro pete, of notice is, never to soon after r pairing. Ta m convinced tbe there are for 
easure 
the aioe peal detained! Tic tig ‘tiniedd he meth 
— beneath the shelves; SS _ : 
h = 
Anerebe 
t is any partieala kind which has a 
bed, unless perhaps i 
the parts of their stems that 
tendency to emit roots from 
are covered 
The Potatoe Onions will now be advancing eet: 
aoc the soil is -_ and so stiff as to i mterfere 
Se eveliing © € the 
£ 
ae 
nibs. loosen it 
i th of 
I have ford the perfect in: * nem entire mon e 
Jun ey as well as of May, sso st fol of Au aggre 
eA ia the - October, principally up 
Dame’s Violet; but it Ss —~ gy eee : 
counted twelve o rt 
re = From the of the caterpillars whe2 I 
received them, I suspect many must ha 
Curtis's Brit. Ent. fol. 420, Hi 
