[For other exchanges, see third page of cover.]
Julia F. Ehrman, Lillian E. Adams, and Walter C. Boult withdraw their names from the exchange list.
Constant Reader, and Others.—Asa Gray's Botany, Springer's Forest Life, Browne's Trees of America, Ingersoll's Friends Worth Knowing, and Rennie's works on Natural History (three volumes, on Birds, Elephants, and Quadrupeds), will prove useful to you. These books are published by Harper & Brothers.
Sam D.—Gillespie's work on surveying will probably meet your need.
F. A. L.—Red Ink.—Boil two ounces of Brazil-wood, half an ounce of alum, half an ounce of crystals of tartar, in sixteen ounces of pure water till the water is reduced one-half. Dissolve in the strained liquor half an ounce of gum-arabic, and add one and a half drams of cochineal powder digested in one and a half ounces of alcohol. This will make a beautiful, permanent ink. But if you prefer, you may take this somewhat easier way: Dissolve an ounce of cochineal powder in half a pint of hot water. When cold, add a quart of spirits of hartshorn. Dilute with three ounces of water. Let it stand a few days, and then pour off the clear liquid.