"I am fully aware that many English varieties are not suited to our climate; others are disposed to burn. The nearest to perfection that a fruit reaches, the greater care and higher culture it requires: it is so with all garden vegetables, with florist's flowers and plants. Neglect the Dahlia, Rose, Holyhock, or Pansy; how soon do the flowers of the three first become single and poor, and the last diminutive in size. Our finest cattle demand the greatest care. Apples are attacked by borers; pears are subject to blight; peaches, gum; plums, apricots and nectarines are injured by curculios; grapes, mildew; corn, fires; wheat has smut; and our potatoes rot; yet persons are found to cultivate one and all of them." . To the above I would add, not only should the ground be trenched and highly manured, but the soil should be an adhesive loam approaching to clay; on thin, light, or sandy soils I have never known them to succeed. Mr. John Slater assured me the finest Alice Mauds he had ever grown were produced on a hard gravel bank, graded down to the subsoil, the latter having been highly manured and broken. Dr. J. H. Baync's failure was known to me at the time I wrote my letter.

A Long Island nurseryman noticed it in his catalogue, as a proof of the failure of foreign varieties here; yet, whilst this failure was heralded abroad, Messrs. Slater, Cammack, Howlett, etc., were producing the most surprising crops. It reminds me of a fact, probably known to most of my readers. A scientific man, Dr. Lardner, delivered a lecture in Bristol, England, on the impossibility of navigating the Atlantic by steam, yet at the very same time, in that city, some simple-minded merchants were engaged in building the Great Western steamship, which, in spite of the predictions of that philosopher, safely opened a pathway for steam over that stormy ocean. And in our more humble sphere, where Dr. Bayne has so signally failed, hard-fisted market gardeners have succeeded. Permit me, however, to add my testimony to Dr. B.'s skill as an orchardist and market gardener, and to the much good his influence has exercised in the region where he resides. If Dr. Bayne's soil is light or sandy, or should he not have given them the system of culture which I have described, failure must have been the inevitable consequence; but if, on the contrary, his soil was suitable - well trenched, manured, and cultivated, and failure was the result, the cause of this failure is worthy of investigation.

Mr. Richard says, "There is no doubt, with equal cultivation, our leading American strawberries will throw every foreign variety far in the back-ground as a profitable market fruit; such has been the experience of Dr. Bayne, and if I am not mistaken, such is the opinion of Mr. Cammack, and nearly every strawberry grower in the neighborhood of Washington city." On the least-labor system, the foreigners will undoubtedly be thrown in the back-ground, but on the good-culture system the result will be somewhat different. Who are "nearly every strawberry grower in the neighborhood of Washington city?" Mr. R. will probably have heard of the two or three tailors, who styled themselves. "We, the tailors of the city of London," and its application he will understand, when he names another gentleman and himself as "nearly all the strawberry-growers in the neighborhood of Wash-ington city." The use made of Mr. Cammack's name was gratuitous. Mr. C. has assured me personally (since Mr. R.'s letter appeared), that his opinion was the reverse of that attributed to him; he expressed surprise at the use made of his name by a gentleman unknown to him, as Mr. R. is, and endorsed what I have previously written; not only have Messrs. Cam-mack, Slater, and Howlett, grown these strawberries successfully, but many others, among whom I may name Mr. I. K. Watt, at the Washington Observatory; Mr. I. Small, of Georgetown; Mr. D. Clagett, an extensive orchardist near the city.

The gentlemen named are among the first Horticulturists here - nearly all members of the Washington Horticultural Society, and have the past two summers shown fruits of extraordinary beauty, but where Mr. Richards has not yet appeared "to throw them into the background".

I cannot let this opportunity pass without noticing the high system of culture adopted by Mr. Cammack, with his fruits and vegetables; more than thirty years has he steadily pursued it. When he first commenced strawberry growing he informed me that they were selling in market at four, and none over six cents per quart, - yet at the very outset he got twenty-five cents per quart. In connection with good culture he related a fact which is worth recording: a year or two since a gentleman calling at his stand, inquired the price of his strawberries; on being informed of the price (twenty-five cents per quart), he remarked he had been in Baltimore the day before, and had seen them sell at six cents per quart; to which Mr. C. replied, he had the evening previous sent 100 quarts to Baltimore, for which he received $25, - an evidence that good culture will pay.

I could point out the same superior culture in his peaches and cantalopes, asparagus; one vegetable, celery, which he has now in market, and which the public can any day see, is of the highest excellence; strangers to our city say it is superior to any which they get in any other city in the Union, the price of this vegetable is about six cents per stick,-whilst Mr. G. is receiving for his best ten cents; market gardening about out city has been advanced much by the example of Mr. C, and in our sister city, by his contemporary, Mr. John Slater.

The following strawberries have succeeded here exceeding well the past season (1858), Victoria, Comte de Flanders, Vicomtesse Hericart de Thury, Triomphe de Gand, La Reine, Seedling, Eliza, etc., and may be taken as standard sorts, and be grown with confidence by any persons who wish a really good strawberry, being large, showy, and of exquisite flavor. Among the recently introduced varieties, Amazon, Exhibition, Jucunda, Magnum Bonum, Marquise de la Tour Mauburg, and Rival Queen, promise well, in this climate.