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## A Tangled Tale

EXCELSIOR. "Goblin, lead them up and down." The ruddy glow of sunset was already fading into the sombre shadows of night, when two travellers might have been observed swiftly—at a pace of six miles in the hour—descending the rugged side of a mountain; the younger bounding from crag to crag with the agility of a fawn, while his companion, whose aged limbs seemed ill at ease in the heavy chain armour habitually worn by tourists in... more...

## Catalan's Constant [Ramanujan's Formula]

No description available

## Deductive Logic

One critic, who was kind enough to look at this book in manuscript, recommended me to abandon the design of Publishing it, on the ground that my logic was too like all other logics; another suggested to me to cut out a considerable amount of new matter. The latter advice I have followed; the former has encouraged me to hope that I shall not be considered guilty of wanton innovation. The few novelties which I have ventured to retain will, I trust,... more...

## Logic Deductive and Inductive

CHAPTER I INTRODUCTORY § 1. Logic is the science that explains what conditions must be fulfilled in order that a proposition may be proved, if it admits of proof. Not, indeed, every such proposition; for as to those that declare the equality or inequality of numbers or other magnitudes, to explain the conditions of their proof belongs to Mathematics: they are said to be quantitative. But as to all other propositions, called qualitative,... more...

## Miscellaneous Mathematical Constants

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## Symbolic Logic

CHAPTER I. INTRODUCTORY. The Universe contains ‘Things.’ [For example, “I,” “London,” “roses,” “redness,” “old English books,” “the letter which I received yesterday.”] Things have ‘Attributes.’ [For example, “large,” “red,” “old,” “which I received yesterday.”] One Thing may have many... more...

## The Earliest Arithmetics in English

INTRODUCTION The number of English arithmetics before the sixteenth century is very small. This is hardly to be wondered at, as no one requiring to use even the simplest operations of the art up to the middle of the fifteenth century was likely to be ignorant of Latin, in which language there were several treatises in a considerable number of manuscripts, as shown by the quantity of them still in existence. Until modern commerce was fairly well... more...

## The Golden Mean or Ratio[(1+sqrt(5))/2]

by Unknown
No description available

## The Mathematicall Praeface to Elements of Geometrie of Euclid of...

â§ The Translator to the Reader. Here is (gentle Reader) nothing (the word of God onely set apart) which so much beautifieth and adorneth the soule and minde of mã, as doth the knowledge of good artes and sciences: as the knowledge of naturall and morall Philosophie. The one setteth before our eyes, the creatures of God, both in the heauens aboue, and in the earth beneath: in which as in a glasse, we beholde the exceding maiestie and... more...

## The Number "e"

by Unknown
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