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THE GENERAL DIRECTORY

FIRST PART

On the form of calculation used by ancient and modern astronomers. This section also covers many of their inventions created to make calculation easier. It focuses especially on the nature of Logarithms Logarithms are mathematical functions that turn complex multiplication into simpler addition. They were a revolutionary tool for 17th-century scientists., their arrangement in tables, and their wide range of uses, provided through a general teaching.

CHAPTER ONE.

What the arc and chord were according to Hipparchus, Ptolemy, and the ancients; why and how they used them for astronomical calculations.

A decorative square drop cap letter N is decorated with foliage and leaf motifs.

I have considered that it would be beneficial and pleasant to provide a short historical overview before I move on to the specific methods of this book. I will briefly explain how much astronomy has progressed in the art of calculation from ancient times to the present. Those who know the difficult labors of the ancients in astronomical calculations will easily appreciate the new ease I reveal here. However, beginners tyrones: students or novices in a particular field of study in this art might not value these tools as they deserve. These students have not yet broken a sweat using those old, laborious methods. If they first look at those difficult paths with their mind's eye, they will appreciate the current simplicity just as much as the experts do.