Reference Books

CERARGYRITE, a mineral species consisting of silver chloride; an important ore of silver. The name cerargyrite is a Greek form (from κέρας, horn, and ἄργυρος, silver) of the older name hornsilver, which was used by K. Gesner as far back as 1565. The chloro-bromide and bromide of silver were also included under this term until they were distinguished chemically in 1841 and... more...

WHAT IS A LETTER? It is not so long since most personal letters, after an extremely formal salutation, began "I take my pen in hand." We do not see that so much nowadays, but the spirit lingers. Pick up the average letter and you cannot fail to discover that the writer has grimly taken his pen in hand and, filled with one thought, has attacked the paper. That one thought is to get the thing... more...

CHAPTER I THE SELECTION AND TESTING OF A GLASS "O telescope, instrument of much knowledge, more precious than any scepter! Is not he who holds thee in his hand made king and lord of the works of God?"—John Kepler. If the pure and elevated pleasure to be derived from the possession and use of a good telescope of three, four, five, or six inches aperture were generally known, I am certain that... more...

INTRODUCTION For years this writer's aim was to visualize the armed Pennsylvanian of earlier days; how he went forth to fight his Indian foe, to slay the bison, moose, elk and smaller game, and on his expeditions to the fields of love: where his firearms and edged weapons originated. To create the living man his arms must be secured, and gradually the present collection was assembled. And he lived... more...

The Ideal Book. There is a wide felt need for a worthy book of sound hygienic and medical facts for the non-medical people. The Ideal Book for this mission should be compact in form, but large enough to give the salient facts, and give these in understandable language; it must not be "loaded" with obsolete and useless junk of odds and ends which have long ceased to be even interesting; it must... more...

Geographical usage confines to the southern part of the island of Great Britain the name commonly given to the great insular power of western Europe. In this restricted sense the present article deals with England, the predominant partner in the United Kingdom of Great Britain and Ireland, both as containing the seat of government and in respect of extent, population and wealth. 1. Topography. England... more...

GENERAL INSTRUCTIONS. 1.  You are required personally to superintend the performance of the routine work of your office and see that it is properly done. 2.  This routine work should be suitably and fairly apportioned amongst your clerks—each clerk (under your superintendence) being responsible for the duty assigned to him. You will, after fair warning, report to the Postmaster General any clerk... more...

THE AMERICAN BUSINESS MAN The business man is the national hero of America, as native to the soil and as typical of the country as baseball or Broadway or big advertising. He is an interesting figure, picturesque and not unlovable, not so dashing perhaps as a knight in armor or a soldier in uniform, but he is not without the noble (and ignoble) qualities which have characterized the tribe of man since... more...

CINCINNATUS,LUCIUS QUINCTIUS, (b. c. 519B.C.), one of the heroes of early Rome, a model of old Roman virtue and simplicity. A persistent opponent of the plebeians, he resisted the proposal of Terentilius Arsa (or Harsa) to draw up a code of written laws applicable equally to patricians and plebeians. He was in humble circumstances, and lived and worked on his own small farm. The story that he became... more...

INTRODUCTION The reasons for binding the leaves of a book are to keep them together in their proper order, and to protect them. That bindings can be made, that will adequately protect books, can be seen from the large number of fifteenth and sixteenth century bindings now existing on books still in excellent condition. That bindings are made, that fail to protect books, may be seen by visiting any... more...