"G. W. McC," Boulder, Col., writes: " Will you kindly answer the following questions in the Gardener's Monthly: (1) What is the best work on botany for a private student and gardener in the latitude of Colorado? (2) Which of the botanical periodicals would be most suitable for same? (3) Is there any work published on fruit-growing in Colorado or California? The standard works being based upon eastern methods are unsuitable for our climate and useless here. (4) What is the best treatise on mushroom culture? Will you give in the Gardener's Monthly a short, comprehensive account of the methods pursued by successful growers of mushrooms in the East, and the average profits of the same?

[To get a general knowledge of botany, as a science, so as to be able to understand all about a plant when Ave seen it, Gray's "Structural Botany " is as good for Colorado as for anywhere. For Colorado plants especially, Porter's "Flora of ("olorado" is the only work which describes the peculiar ones in one work, but this is unfortunately "out of print," as the booksellers say, and only second-hand copies can be bought, and these not often. Beginning where the composite flowers end, and ending near the labiate plants, Dr. Gray's " Synoptical Flora of North America," contains all of the Colorado plants within those orders. When the rest of the work is completed by Dr. Gray we shall have all of the plants of North America, Colo rado included, in one work. (2) Of strictly botanical periodicals, there are but three in our country: Case's " Index," quarterly, Richmond, Ind.; " Botanical Gazette," Crawfordsville, Ind.; and " Bulletin of the Torrey Club," New York City. They are cheap, and most working botanists take them all. It would be difficult to decide the best. Ten cents to each would no doubt bring a number, and then one could decide which suited his taste. (3) There is no separate work on Colorado or California fruit growing.

The periodical literature, answering all questions, takes the bread out of the bookmaker's mouth. The *' Pacific Rural Press " of San Francisco, and the Gardener's Monthly, of Philadelphia, give attention to these matters when it is brought before them. The editor of the latter magazine has been four times through the State, and has experienced correspondents there. (4) So far as we know, no one has as yet made a specialty of growing mushrooms for market. If so we shall be glad to hear. - Ed. G. M.]