Thus treated, the cotton becomes semi-lucent, retentive of heat, and is not one-fifth the cost of glass. - Extraordinary accounts of the effects of electricity on vegetation were circulated ten or twelve years ago, but careful experiments have not proved its utility; those experiments were detailed in the Journal of the London Horticultural Society, and were copied into the Horticulturist, vol. i. page 534, but nothing since has been proved to give the subject importance. - Willis, in his amusing "Letters from under a Bridge," speaking of the selection of a site to make a paradise in the country, remarks: "I am supposing you want a patch of the globe's surface to yourself,, and room enough to scream, let off champagne corks, or throw stones, without disturbance to your neighbor." "But," he goes on to say, "this desire for seclusion has led some farther into the wilderness than necessary, two or three miles being quite far enough to send your horse to be shod, or to aend for doctor or washerwoman, and half the distance would be better, if there was no prospect of the extension of the Tillage limits. But the common diameter of idle boy's rambles is a mile out of the.

Tillage, and to be beyond that is very necessary, if you care for plume or apples." There is philosophy and common sense in this and much of those totters. - By way of London! we learn that the Moiroous have founded a Horticultural Society, W.Wood-ruff, President; the first meeting was opened with prayer; peaches were the only object of exhibition, by two ladies, whose husbands were absent preaching their gospel; we are told, "the whole appearance of the stand was sufficient to. excite the epicurean taste of the moat refined, and was a feast never before, equalled in these rest mountain regions. The people seem very ignorant of horticulture. - Is it net a curious circumstance, that we rarely or never hear even the name of the greatest living botanist in Europe? It is Robert Brawn, a retiring gentleman, residing in London. "Humboldt," said.Sir E. H. Inglis, at a meeting of the British Association, "described him as le premier botaniete de I'Eutrope, accurate, sagacious, and profound, and whose knowledge is only equalled by his modesty.

May I add," be continued, " the expression of every one's wish that he would deposit more of his knowledge in print?" Mr. Brown, when a young man, accompanied Captain Flinders in his voyage to New South Wales, end, on his return, published an account of the botany of that region* Sir Joseph Banks, seeing his extraordinary aptitude for science, made him his librarian and curator of his botanical collection, which is now in the British Museum; he left him a house to live in,but nothing to keep it, and he has enjoyed since a moderate income from the Museum, where he has a light employment, and must be now more than eighty years old. A greater authority in botany than Humboldt, De Candolle, said of him: Facile princeps Botanicerum. - A French physician has lately propounded a theory on the effect of color, on health. Observations for many years show that workers who occupied rooms thoroughly lighted and ventilated, were more healthy than those in rooms lighted with small windows, and from one side only. In two adjoining rooms, equally well ventilated, one set of workmen were healthy and cheerful, and the other melancholy, and often unable to work.

The cheerful workers were in a room wholly whitewashed, and the melancholy men occupied a room colored with yellow ochre, which on being well whitened, the men-recovered, and were cheerful and. healthy. It was found in extensive practice, that whenever occupiers of yellow or buff-oolored rooms could be induced to whitewash them, a corresponding improvement in health and spirits resulted. This is most important for schools, asylums, and hospitals, as well as manufacturers' rooms. - The French Exposition, last year, was visited by four million and a half of people; the Great Exhibition in London, in 1851, numbered over six millions; 40,000 English visited the French, but only 27,000 came to London from France. - The eccentric Lord Holland used to give his horses a weekly concert in a covered gallery, specially erected for the purpose. He maintained that it cheered their hearts, and improved their temper, and an eye-witness says that they seemed to be greatly delighted therewith. - George Don, the editor of Don's Miller's Gardeners1 Dictionary, a work of celebrity and usefulness, died in February last, at the age of fifty-eight; he was the last of a well-known family of botanists.

He travelled as collector of the London Horticultural Society, in Brazil, the West Indies, and Sierra Leone, and added largely to their collections. - Petunias, so peculiarly adapted to out warm and dry climate, improve little less rapidly than the verbena; striped and mottled varieties are not now very uncommon. The English advertise a new Double White. The following is from a London paper: "Petunia Imperial. Two plants of this novelty in the petunia way, have been in flower for the last three weeks. The blooms measure considerably over two inches across, and are quite as double as those of any firstrate carnation. It is very sweet, the scent resembling that of a rich stock. It will prove a great acquisition lor bouquet making,, and room decoration, rases, etc. The habit in pots is dwarf and good, flowering early, and it has every appearance of continuing in blossom for a length of time." - Mr. Fortune, the introducer of Weigela rosea, Dicentra spectabilis, and so many of our other valuable new plants, is still collecting in China. - Our transatlantic friends are not often found guilty of honoring our cultivators or celebrities and their productions, by naming them accordingly.

In a French catalogue, however, we find amongst the new roses, "Madame Knorr," "Capitaine - Ingraam," and "Frederic Seulie."-r'Fhe new Japan Lettuce seems likely to be a favorite. The heat of summer has little effect on its hard, compact heads, when even the Drum-Head " runs" to seed.