Showing: 11-20 results of 1769

INTRODUCTION. Definition of Soap—Properties—Hydrolysis—Detergent Action. It has been said that the use of soap is a gauge of the civilisation of a nation, but though this may perhaps be in a great measure correct at the present day, the use of soap has not always been co-existent with civilisation, for according to Pliny (Nat. Hist., xxviii., 12, 51) soap was first introduced into Rome from Germany, having been discovered by... more...

INTRODUCTION A conundrum is a riddle in the form of a question, the answer to which involves a pun. Originally the term was applied to any quaint expression. It is thus, in its modern form, a union of the elaborated riddle and the impromptu pun. With the earliest development of intelligence came the discovery of likeness and difference in things, and the search for analogy was carried out along both sensible and absurd lines, the latter... more...

FOREWORD As this book is written for boys of all ages, it has been divided under two general heads, "The Tomahawk Camps" and "The Axe Camps," that is, camps which may be built with no tool but a hatchet, and camps that will need the aid of an axe. The smallest boys can build some of the simple shelters and the older boys can build the more difficult ones. The reader may, if he likes, begin with the first of the book, build his way through it,... more...

Dedication To the Philippine Youth The subject of Doctor Rizal’s first prize-winning poem was The Philippine Youth, and its theme was “Growth.” The study of the growth of free ideas, as illustrated in this book of his lineage, life and labors, may therefore fittingly be dedicated to the “fair hope of the fatherland.” Except in the case of some few men of great genius, those who are accustomed to absolutism cannot... more...

I HAVE selected to-night the particular subject of Yeast for two reasons—or, rather, I should say for three. In the first place, because it is one of the simplest and the most familiar objects with which we are acquainted. In the second place, because the facts and phenomena which I have to describe are so simple that it is possible to put them before you without the help of any of those pictures or diagrams which are needed when matters... more...


FOREWORD Much research has been devoted to the effects of nuclear weapons. But studies have been concerned for the most part with those immediate consequences which would be suffered by a country that was the direct target of nuclear attack. Relatively few studies have examined the worldwide, long term effects. Realistic and responsible arms control policy calls for our knowing more about these wider effects and for making this knowledge... more...

INTRODUCTION. It is less than twenty-five years since the first cold Grapery was erected on the Hudson. Since the success of the culture of the delicious varieties of the exotic Grape has been demonstrated, the number of graperies has annually increased, and during the last ten years in a very rapid ratio, until they have become recognized as possible and desirable, among those even whose circumstances are moderate and limited. The... more...

EDITOR'S PREFACE In issuing these volumes of a series of Handbooks on the Artistic Crafts, it will be well to state what are our general aims. In the first place, we wish to provide trustworthy text-books of workshop practise, from the points of view of experts who have critically examined the methods current in the shops, and putting aside vain survivals, are prepared to say what is good workmanship, and to set up a standard of quality in the... more...

EDITOR'S PREFACE In issuing these volumes of a series of Handbooks on the Artistic Crafts, it will be well to state what are our general aims. In the first place, we wish to provide trustworthy text-books of workshop practice, from the points of view of experts who have critically examined the methods current in the shops, and putting aside vain survivals, are prepared to say what is good workmanship, and to set up a standard of quality in the... more...

THE HISTORY OF THE APPLE-TREE. It is remarkable how closely the history of the Apple-tree is connected with that of man. The geologist tells us that the order of the Rosaceae, which includes the Apple, also the true Grasses, and the Labiatae, or Mints, were introduced only a short time previous to the appearance of man on the globe. It appears that apples made a part of the food of that unknown primitive people whose traces have lately been... more...