8.1853. | THE GARDENERS’ CHRONICLE. 117 
E e—a а 
E Mar. 23, The puis — great progress ; the bracts — particu It is evident, in the first 
, Buds нг bracts separating; racemes separa that whatever — of calculation we quam en 
» Ah The buds is far advanced ; the bracts are | аге — limits of temperature which must not be 
0. Leaves I teginning to expand ; racemes beginning | widely separated ; the raceme can be readily | exce in hothouses, or — below whi ар we cannot 
* distinguished. descend without not only injuring the development of 
Leaves S growing rapidly; racemes showing out. p 007 000 үчн are ready to open; the racemes the plant, but even en gering its existence. What 
" u Generall y in in leaf ; the racemes showing almost elon are these limits! They vary, o ding to 
» уо » 29. The racemes are much h elongated e kind of plant ; but we p w good experiments 
13. Foliation 5 complete; the peduncles „ 30. Some of the leaves begin to expand ; the in thi ncaa It will be understood that formula 
2 elongate, and the bracts begin to turn yellow. — continue to elongate; all the bracts | which I hav e proposed is — wore — the 
14. Completely in leaf ; the 3 elongate, the are separated. condition of not de medium te 
ad flower-buds are swelling April 1. All the 1 begin to expand; the racemes beyon certain limits. 
15. The e aie yos n open ; the bracts show themselves completely ; the flower a likewise that plants do not require the 
» fa fall {when gern separate. — amount of heat to rouse them fro 
16. Some flower. buds begin to 
17. Some flower - buds are — — and many 
are coloure 
* з 
18. ater flowers are open; nearly all the buds are 
и du от" 
3. The 
4, Very ye ernest 
Mets all the bracts are drie Reaumur, or 77° to 79? Fahr. But during the 
19. No al ion. night the temperature fell to 15° and, under some 
„ 20. Many fion Barrio ,to 109 R., or from 66% to 55? Fahr. 
+ 21. The preter гоме tof the ccn are open. estimate that we may take 20? centigrade, or 68? Fahr., 
» 22. Floration almost comple for the mean, 
» 23. Scag ser eed all ihe bracts have nn w, from many years’ experience, I have indicated, 
» 24. grad begin push ; backward | in ille ‘Annuaire de UV Observatoire, that the Lilac ° (8 
are being develope cm a sum of tures equal to 
* 
25. The young A = making rapid grow 
the are much да, and 
their er biis are well swelled. 
26. The Ae of hi new shoots begin to expand ; 
continue their development. 
B 
2 8 
о 
— 
potted, and plac 
lam, a Aero анау day at 1 
Feb. 14, pem pii into the house is buds were far 
„ 15. The leaves 4 — to make their appearance ; 
the brac мр! to uM. 
| rothomagensis) ^K 
wth ; 191° . for 
of its first te 10 7 rather 
mean temperature equal to 1315. 
ойе of свой of 2 Boussingault, and Gas- 
ono it would require nine empera- 
e of 20°, and according 8: ay — aay three or 
б 
абе 
lation would eat us p suppose would be necessary to 
produee the effect just mentioned, the plant was in full 
lea 
which is 
e | may, I think, throw mueh light on that part o 
i has been made 
the tables of M. Schram it appears that it | are 
Iti is shown in the Annuaire de Sanne eemper that it | of 
m their winter, 
mains to 
ormant, state starting-point — remains 
be established 
— W. e the effective temperature, 
to calculat temperature, 
that is to say, i which effectively contribute to 
- “development of the plant, by reckoning from the 
f the centigrade — cale, 
rt froin a — of tempera 
tant in the нозе — Án whieh will be & 
ariable quantity ? 
what plants almost resist forcing, and refuse 
roduce flowers and fruit, nothwithstanding the 
мед of heat ? 
any questions arise in following up this mode of 
observation, ased on calculation, - which 
natural 
the subject ^ this note. 
Academy of 
to 
A. Quetelet, 3 Secretary of the 
Science, Brussels ; in the Rev. Hort. 
[Note by the . зно —The preceding calculations 
scale, the zero of 
similar mode of calculation will 2 * э same res 
ose obtained b Fahrenheit's — 
e zero of 
essary, & 
16. The ae рата 5 "the raceme. ia requires a temperature of 508° centigrade to g out explained, more especially as “Fahrenheit thermo- 
the first flowers of the Lilac ; or rather, a odis to | meter is s the ue chiefly used in this cou 
„ 17. The reine. equ. rapidly ; the raceme is my mode of calculating, a coun of sq — t: daily Tag i We ke t es uares of the daily 
18. Thel E о come out had i th; th perature equal to 4652. According to Adanson, more ten ad from Fahrenheit’s scale, but we 
n iine — are а а ed mi 5 e | than 25 days would be necessary ; L rdin; must take the number of d which t observed 
ts are ethod, only 11 o Now, latter result agrees | temperature is above 32, and then operate with them 
19, The lea at t formed ; th with the experimen ade in the ic Garden, by | as M. Quetelet directs in the case of the centigrade 
iy alm эз тоа дө th E "e whic h the flowering of this kind of plant was ascer- | degrees ; same results will be obtained. 
„ 20. Generell in le: ide ie cok зер ыр : r а. on an average, 9} days. This may be proved by the following example :— 
^ ecd E меа 8 ched. elon- ean temperature was 20° centigrade, Then, The e of 8 days of a — ар of 10 — 
wie Pi om ret Rp ie ж 2 ada Hit oec, 15 on, 505 — 25 days 9 hours; but the grade is — by 10x 10— 100, the square 
elongated ; de bracts bass — fallen. time by 3 method is 2 n = 11; days 15 5 hours. — € irm ре E - this multiplied by 8, the 
» 22. p com lete; the flower Translator "Toad — 
elled ; bracts ail falle T much) Tih results of caloulating me он of 1еайп and | 99 20% a= 37 e pra the 2 efiect of & yr — 
U» ^ айлан generally much developed. flowering by y the squares of th E mperatures ene тес 
P] — uch elon ted ; the fi u surprising accordance e "defin made 1 
iem em por eg th гче: If this me shall be more completely heit's in scale. rr ores MES 
» E Some of the flower buds are ready to open. mene e cene proofs; it will aion great prac- 2592 ? 
» me of 2 colo tical advanta 1 egrees centigrade corresponds 68° 
„ 27. Some are open, and many of the buds| The necessity iy of be gence the колер оо tem. вче де всаје, ог 36° above 32; 36 х 8 
аге со eratures their sind ie aes чи АЧА, = 10,368, which is equal to 4 times times 2592, the effect of 
* 28. A — portion of the flowers are open. more — “evident to me fi bservation of 18 above 32. From this it is e t mploy- 
29. The pollen escapes from the anthers what happens when the temperature, at the principal |; the à legrees indicated by Fahrenheit scole, lass £2 
March 1. Some racemes x Mee wing season, is much elevated, or bei depressed, | ug в. эж * ui of ih а " n Е Meets as | th o 
» 2. Many flowers are open. comparatively with the usual retenue ече direstty obtained by using the ceni 
» 9. Floration almost complete. vegetation um — Se i 1 png чыйт: tigrade seal 
“зу tion com second, its usual pace is slackened, ог 1 1з even appa- 
: 5. Many of the racemes dried rend brought to a stand-still, Home Gore 
i flower ering. me M met " seeding to the method’ of Adanson, urge ms я Thawi ng En - ee d an aded vg 
0 — M Comte de Gasparin, vegetation ere in whi winter a Dim many Pom 
. — — —— е —— — —f rotho- much in two days ub a temperature of 10? as it Geraniums, larias, Cinerarias, &c., which are 
Feb. 22. Buds much swelled. Mii in one day with 20^, or in four days with 5°, In stowed away amongst the fruit On the l4th 
—— Buds uch advanced. all these e sum ii d the results ought | st there was every appearance of a se 
» 24. B s e n; meme enlarge. consequently to be the same — € I iy S with mats, and the Peach- 
» . es begin to appear; the bracts open a t ethod which I propose, the effects would be house being at work opened the door — 
little ; frisan ly be perceived. respectively in the proportions of 200, 400, and 100 ; | cating with th hard-house, to allow the warm air to 
” are formed have p t is with 20°, in the mon of March, pass into the latter, and left t that — 
the braets are turning yellow example, e, the p of v veg спан would | daybreak next сеи е rt 0 
„ 27. Leaves greatly advanced in growth : the be double that dn it 3 has ak: a mean tem- doors stood 14 below the freezing point, on 
velada “tae cua zo chat ali the | perature of 10°. progress would be one-half going into the house I found that my hoary enemy 
be + the ither less — зе temperature were low had done work severely ; at first I thought 
— f abot hr del proposed t te Tat o Creed Б ten mt ne ALT aui 
28. rance, of whi e.is a member, à new me А г, 
* Some —— dnd — : cnr — — e by which the progress of vegetation may be raise a gentle steam amongst the plants it would — 
ч 3 ока Tt ists in multiplying the tem save them; I, therefore, two —À 
» 29. A considerable стра of th are | by the square of the number of days. According to his | 5°0% ce, and then went medie a pail, into 
ene the pedicels are — aa 3 the effects produced in the preceding les | Which I put as m s ] 1 — 
vt eget en be, respectively, as follows :— ik Wii Bem D ME ) — 
March 1. The — continue their de velo ent ; the Two days at 10° A. OE ied —— little effect, the i PE tin тыш, and 
cles much ; жм ower buds Four days at 5 we 16x 5=80 i Шу frozen. I kept changing the bricks 
П greatly ; the bracts fall. by this mode of calculating the effect of they cooled, and in an hour began to 
» 2 —.— opm end m the racemes elongate; day at 20° would be — less than two days at 10° ; | assume а wearied, languid appearance, like the sun 
and, on the contrary, the temperature in ing from an eclipse, and dar green 
” are open ; "ima flower buds are | to 5 during four days would produce double the effect ge to a yellow tinge. t the steam 
4 Massif of two days at 10°. These results are evidently up for another hour ; I did not plant ; 
„ — — y owers are open ; csi agna escapes. | variance with by experiment, and parti-|the only thing injured was the tips of Heliotrope 
* 6 early all the flowers are open cularly with those exhibited by the tables of o euttings. I kept them all shaded till noon, when I 
» 6. Floration com made in the Botanic Garden at Brussels. M. Babinet | fully exposed them to light and air, pn a 
ions on a Lilac (S. rothomagensis), in the | observes, that, “in general, the effect produced by a | gentle syringing; they seemed improved by the treat- 
pow constant cause acting for a certain time 1 ment, and looked fresher than they did the ые А before. 
eb. 7. The buds are much swelled ; the bracts are to the i tensity of the cause and the square of the time! ng with a hot brick is not a new idea, it is the 
Although this is true as vitation—a falling | celebrated Dr. C — va — by which means he 
„ 2l, The buds advance; the bracts begin to sepa- | body passing through a sp nate to its weig health to a e ts. W. 
; can juli be perceived, and the square of the time ; and although the assimi- | Fitzimon, gr. а W. Phillipps, Ен, R i Lodge. 
March 2. The buds are far advanced ; the bracts are lation of this eff with that of heat in regard to Deoda quite agree with - in your opinion 
tly plants may be very yet it is more specious | of ns ability with which your Indian frien sta 
The problem in question comprises various inte- 
tanical arguments that may be employed to prove 
the identity of f the Deodar and the Cedar of Lebanon, 
