Jierieu's und Kj lravfs .— Ilorficu/hn'e, 4 ;).') 
lias never obtained a crop of Carrots vvurtli aiij thiiij*’, alllioaiili he lias tried every 
means his jndg'ment could suggest, or others reeoininend. In the autumn of 1830, 
being engaged in preparing a suitable soil tor evergreens and American plants, 
the thought struck him that he might try the etlects.of the same soil in growing 
Carrots. The sort of peat used, is called AJoas-i/mr, that is, pure decayed vege¬ 
table matter, without any mixture of sand, &c. The ground was trenched about 
two feet deep, and a little dung added. The tirst frost was taken advantage 
of, for the purpose of wheeling on the peat, which was laid regularly on, about 
eight inches thick, with a slight dusting of lime. In this state it lay till 
spring, exposed to the frost, when it was dug in,—the seed was sown in the usual 
manner,—it received the common routine of culture,—and the success was most 
complete. 
Loudon's New-Invented Boiler. 
After Mr, Loudon has stated that a li'reut i/npi'ovement in the construction of 
Boilers of every deso'iption^ has just been made by Mr. Perkins, the celebrated 
engineer, particularly applicable to the heating of hot-houses, by hot water,— 
he proceeds to give a few ideas of a very simple construction for a boiler; and he 
says, suppose we have a common boiler, such as is used in common wash-houses, 
and which Mr. Kewley uses in the siphon mode of circulating hot water; then 
place another boiler within it, of such a size as to leave only a few inches between 
the inner boiler and the outer boiler all round, and support it in this position by 
stays, (fig. 73) Let this inner boiler have a hole in its bottom, about one-third 
72 of its diameter, and let its rim be two inches below 
the level of the water to be heated. These arrange- 
uients being made, and heat applied below, a circula¬ 
tion instantly takes place, and continues; the water 
coming into contact with the heated bottom and sides 
of the outer boiler, rising rapidly to the surface, and 
descending through the inner boiler, which thus ne¬ 
cessarily contains the coldest portion of the liquid. 
One great advantage of this construction is, that the bottom of the outer boiler, 
having its heat constantly carried oft’by the liquid, is not liable to burn out. For 
the siphon and level modes of circulating water in hothouses, this boiler promises 
to be a great improvement. 
3. —Traxsaction's of 
THE London Horticultural Society'. 
A Report on the P^arieties of the Pine-Apple, cultivated in the Society's Gardens. 
By Mr. Donald Munro, F.L.S., Gardener to the Society. Read, De¬ 
cember 7th & 21st, 1830, and January 4th, 1831. 
Continued from page 403. 
SPECIES I.—ANANASSA BRACTEATA. 
1. Scarlet Pine. —Brazilian Scarlet, of the Horticultural Society’s Catalogue. 
And Ananassa bracteatu, of the Botanical Register, vol. 13, fol. 1081, 
Leaves remarkably long and flat, rather broad and flaccid, of a yellowish green, 
often tinged with pale brown, and almost destitute of mealiness, spines very 
strong, far asunder, and rather regular. Flowers large, dark purple, contrast¬ 
ing beautifully with the scales, which are of a brilliant scarlet at that stage of 
growth. Fruit pyramidal, before ripening of a dullish yellow colour, on its 
