On these bleached leaves her ladyship painted various beautiful designs and writings, which were much admired. - If you have not a blind to protect your camellias from the sun, melt some jelly me, with scarcely any water (say half a gallon of it), and use, say half a pint of water. If you have not Jelly size, use glue or other size, so as to make a strong solution. Into that quantity, place about the sise of a walnut of whitening, half .a drachm glass of turpentine, and as much boiled Unseed oil. Stir it all well together, and, when very hot, draw it over the glass when dry, and, if possible, when the sun is shining. This, put on outside, will remain until the heavy rains of autumn help to loosen it. Placed inside, it will remain longer. If daubed with a dry brush as put on, it will look. like rough glass. A little soda in water will soon remove it when that is necessary. - At the Duke of Devonshire's garden is an extensive peach-house, almost wholly filled by one tree, from seventy to seventy-five feet in the spread of its branches, and from seventeen to twenty foet in height; and it may, indeed, be termed the perfection of a peach-tree, for its size is only equalled by the quantity of fruit it produves - -from seventy to eighty dosen annually. - Prof. Hensiow's Dictionary of Botanic Tenax, commenced several years since in ltaund's Botanist and Botanic Gordon (but, we believe, not completed there), has now appeared in a separate volume, published by Groombridge, London.

The nursery established in Algeria by the French Government, at the instance of the socete d'Acclimation, prospers with some of its productions. Three plants of Caoutohouc (Ficus elaotica), brought from Coromandel twelve yean ago,- are now "nearly ten metres high, and eighty centimetres in ciroumferenoe at one .metre from the ground, and the branches, extending horisontally, cover a great space." These trees were tapped in 1856, in order that specimens of Algerine Caoutohouo might appear in the Paris Exhibition. The Croton oebifermn (from China) js also successful, having begun to yield fruit, and the sugar-sorgho. "This latter plant," says M. Hardy, the director, "secretes on the sarfieoe of its stalks, at full maturity, a white resinous powder, from which candles could be made. A hectare of sorgho gives more than a hundred kilogrammes of this substance." As yet, the attempts made to acclimatise wax. and tallow-bearing plants, the gutta perche and Peruvian bark, have failed. - There is a project for starting a manufactory of perfumes in Algeria, originating in M. Millon's ingenious researches.

In a description of his process, we are told that, "to avoid the alterations which flowers undergo on drying or distillation, he separates the aromatic part by dissolving it in a very volatile liquid, which is afterwards expelled by distillation. With such a solvent, the distillation is attended by no inconvenience, for it may be performed at a low temperature." The best solvents are ether and sulphuret of carbon. "Properly managed, there is very little loss of the solvent, and the distillation is rapidly performed, much more rapidly, and with a larger quantity of leaves and flowers, than by the ordinary method. But the gathering of the flowers should be done at the proper time of day for each flower. Thus, the carnation gives off its perfume after an exposure of two or three hours to the sun. Roses, on the contrary, should be gathered in the morning as soon as well open; the jasmine before sunrise." By this process, the perfume becomes isolated, and may be kept exposed to the air for years without alteration.

The project becomes important by the side of the fact, that the annual value of the perfumes exported from France is 30,000,000 francs. - The Institute of British Architects announce, as subjects for future prizes: "The Application of Wrought Iron to Structural Purposes;" " The Influence of Local Materials on English Architecture;" and they promise a tangible honor " for the best design in not less than five drawings, for a marine sanitarium, or building for the temporary residence of a limited number of convalescents belonging to the middle and upper classes of society." The Institute do not confine themselves to the merely useful, as Mr. Papworth's paper lately read before them, on "Beauty in Architecture and its Alliance with the Past," abundantly testifies. - Certain agricultural chemists in France have discovered that pounded glass is profitable in cultivation of the land; and M. Paul Thenard is making experiments, on a great scale, with the pulverised slag of blast furnaces. This slag he believes to be equivalent to feldspathic rook, and eminently attackable by the agents present in the soil and atmosphere; for the constituents are silicates, anhydrous potash, and iron.

He has set up the necessary machinery for pulverizing the stubborn lumps, and promises to publish his results as soon as they are justified by practice. Should they confirm the results obtained on a smaller scale, what an opening there will be for a new branch of industry, in the preparation of a fertilizer from heaps of refuse at present regarded as a nuisance! - Meteoric stones lead to the strong inference that the materials of the moon are exact representatives of our system; for up to the present time, no element has been found in a meteorite that has not its counterpart on the earth; we certainly have the proof, at least as far as we may ever expect to get it, that some materials of other portions of the universe are identical with those of our earth. - Friga Domo is the name of a canvas sold in England, prepared from hair and wool - a perfect non-conductor of heat and cold, keeping a fixed temperature. It is adapted to preserving fruits and flowers from the scorching rays of the sun, from wind, from attacks of insects, and from morning frost. It is two yards wide, and may be had of any required length, at about thirty-seven cents per yard run.

It would be well for some of our seed-store men to introduce it. - Prof. George Wilson, of Edinburgh, writing on the physical sciences, happily remarks: "A cattle dealer will give you one calf which shall certainly, in course of time, prove a bountiful yielder of milk and cream; another, which shall as certainly be a fatted ox when three years old; a third, which shall by-and-by be a match for a horse at the plough. The Yorkshire broadcloth makers choose by preference the long-stapled wool of sheep fed plentifully upon artificial grasses, turnips, and the like. The Welsh blanket makers, on the other hand, prefer the shorter wool of sheep cropping the natural grass of the hills; whilst the Scotch tartan shawl weavers work only with Australian or Saxon wools. In like manner, the comb-makers will tell you that the farmers are injuring them, by multiplying breeds of cattle which quickly fatten, and are, in consequence, killed before their horns are well grown; and those same industrialists will cuniously distinguish between the tortoise-shell from one region of the sea and that from another.

I should never end, were I to pursue this matter." Let those illustrations suffice to show that living organisms are not only industrialists like ourselves, and, in many cases, more skilful artists, but are also machines and apparatus which, within certain wide limits, we can wield at will.