The American Exotic and Botanic Garden Company, of Brooklyn, was organised in March, 1872, having for its object the formation of a winter garden, or a Crystal Palace, for the exhibition of rare specimens of the "Flora of Nature." At present the company are actively at work with their improvements, and are selling their surplus flowers, which they produce, to the New York dealers. The grounds are situated near the line of Bedford avenue and in the near neighborhood of Prospect Park. The greenhouses and other improvements are all of the most substantial character, and have been built with a view to utility as well as strength.

Section No. 1 consists of a south house, 35x240 feet long, with a cellar containing boiler-room and sections devoted to the raising of mushrooms. In this department there is a well two hundred feet in depth, with an engine and pump which raises water for the entire establishment. Connected with the south house are seven center houses, each 130x35 feet, which adjoin on the north a tropical fernery 240x9 feet.

Section No. 2 contains the vinery, 240x30 feet, which is arbored inside, and completely covered with running roses; and a front house with a circular glass roof and interior balconies. This house is 240x20 feet, and is one of a series of houses which is to extend around the whole plot. The finished building is to be 660 feet front, with wings of 300 feet each. Sections Nos. 1 and 2 are heated by a powerful hot water apparatus (designed by Mr. Ogden P. Pell, the superintendent in charge), through a line of four-inch pipe which measures four miles in length. The heat was deficient during the first year, but since then improvements have been made in the apparatus, and it does its work to the satisfaction of all concerned. Two boilers are required to heat the water for these four miles of pipe, and one hundred and twenty-five tons of coal are consumed during the season.

During the present season the front or circular house is to be opened for the exhibition of camellias only. Another house is to be devoted to roses, and so on to the end of the chapter. In the center houses two lines of benches or tables have been built for the culture of tender exotics. These tables are first made as nearly watertight as possible, after which they are coated with tar paint on the inside and then filled with sand or mould, when they are ready for the plants. In one house there are already several thousand cuttings of roses started. These are intended for the' spring sales. The rose stock already in flower, or to come into flower during the early fall, amounts to about thirty thousand plants. The great majority of the rose stock consists of the ten or twelve varieties of best sorts. Of carnations there are upwards of ten thousand plants. Of the calla lily, the flower of which is so much prized during the Easter season, the stock comprises three thousand plants; and then there are the heliotrope, geranium, bouvardia, begonia, jessamine, azaleas, ferns, fuchsias in equal quantity and variety.

To go through these extensive houses is absolutely bewildering; and while one would imagine that the establishment has the capacity to supply the whole New York market, it in reality supplies only a small part of the flowers demanded by the retail trade. During the coming season Mr. Pell estimates the sales from the gardens at About thirty thousand dollars. This estimate includes cut flowers during the winter and bedding out plants for sales next spring.

Mr. Herman Viser, the gardener in charge of the growing departments of the garden, estimates that they will cut flowers this season as follows: Of carnations, from three to four thousand a day; rosebuds, from two to three thousand daily; callas, from five hundred to one thousand; ten thousand geranium leaves; and heliotropes, camellias, azaleas, English, or as they are commonly called, wild violets, in like proportion.