A lee-board may be used to advantage in working to windward. It should be hung over the lee-side a little forward of amidships. The simplest way of making it fast is to pass a line through holes in its upper edge so that turns can be taken over the cleats used for sheets. The strain of a lee-board is quite heavy and all its connections must be made strong. It has of course to be shifted from side to side as often as the canoe goes about. In paddling some sort of a cushion or elastic seat is necessary. Abrasions and possibly more serious difficulties will follow a disregard of this advice. Do not undertake to be a canoeist unless you can swim easily and well, and do not attempt to sail until you are well accustomed to your boat under paddle. To render cloth of any kind water-proof the following recipe may be found useful: Into a bucket of soft water put half a pound of sugar of lead and half a pound of powdered alum: stir at intervals during a day or two until a clear, saturated solution is formed. Pour off into another vessel, soak the cloth therein for twenty-four hours and then hang it to dry in the shade without wringing. By this process an insoluble salt is deposited on the cloth fibres and the fabric will shed water like a duck's back. Woolens such as good Scotch tweed, retain their water-proof qualities indefinitely, cottons not so long. A glue which is practically water-proof may be made by boiling isinglass (Russian is best) in skimmed milk. The proper proportion is about two ounces to a pint. Common glue treated in like manner is rendered a good deal more capable of resisting moisture than when made with water in the usual way. THE END. _PUBLICATIONS OF G. P. PUTNAM'S SONS._ _FOR LIBRARIES, TEACHERS, STUDENTS, AND FAMILY USE. COMPREHENSIVE, COMPACT AND CONVENIENT FOR REFERENCE._ THE HOME ENCYCLOPÆDIA OF BIOGRAPHY, HISTORY, LITERATURE, CHRONOLOGY AND ESSENTIAL FACTS. COMPRISED IN TWO PARTS. Price in Cloth, $9 50; in half Morocco, $14 50. SOLD SEPARATELY OR TOGETHER. PART I THE WORLD'S PROGRESS A Dictionary of Dates, being a Chronological and Alphabetical Record of all Essential facts in the Progress of Society, from the beginning of History to August, 1877. With Chronological Tables, Biographical Index, and a Chart of History, By G. P. PUTNAM, A.M. Revised and continued by F. B. Perkins. In one handsome octavo volume of 1,000 pages, cloth extra, $4.50; half morocco, $7.00. CONTENTS: