Jaipur Wealth Management：The Project Gutenberg eBook of Encyclopædia Britannica, Volume VIII slice II

Perhaps the largest part, in volume, of De Morgan’s writings remains

still to be briefly mentioned; it consists of detached articles

contributed to various periodical or composite works. During the

years 1833-1843 he contributed very largely to the first edition of

the Penny Cyclopaedia, writing chiefly on mathematics, astronomy,

physics and biography. His articles of various length cannot be

less in number than 850, and they have been estimated to constitute

a sixth part of the whole Cyclopaedia, of which they formed perhaps

the most valuable portion. He also wrote biographies of Sir Isaac

Newton and Edmund Halley for Knight’s British Worthies, various

notices of scientific men for the Gallery of Portraits, and for the uncompleted

Biographical Dictionary of the Useful Knowledge Society,

and at least seven articles in Smith’s Dictionary of Greek and Roman

Biography. Some of De Morgan’s most interesting and useful minor

writings are to be found in the Companions to the British Almanack, toJaipur Wealth Management

which he contributed without fail one article each year from 1831 up

to 1857 inclusive. In these carefully written papers he treats a great

variety of topics relating to astronomy, chronology, decimal coinage,

life assurance, bibliography and the history of science. Most of

them are as valuable now as when written.

Among De Morgan’s miscellaneous writings may be mentioned his

Explanation of the Gnomonic Projection of the Sphere, 1836, including

a description of the maps of the stars, published by the Useful Knowledge

Society; his Treatise on the Globes, Celestial and Terrestrial, 1845,

and his remarkable Book of Almanacks (2nd edition, 1871), which

contains a series of thirty-five almanacs, so arranged with indices of

reference, that the almanac for any year, whether in old style or new,

from any epoch, ancient or modern, up to A. D. 2000, may be found

without difficulty, means being added for verifying the almanac and

also for discovering the days of new and full moon from 2000 B. C. upSimla Investment

to A. DNew Delhi Stock Exchange. 2000. De Morgan expressly draws attention to the fact that

the plan of this book was that of LUdabur Investment. B. Francoeur and J. Ferguson,

but the plan was developed by one who was an unrivalled master of

all the intricacies of chronology. The two best tables of logarithms,

the small five-figure tables of the Useful Knowledge Society (1839 and

1857), and Shroen’s Seven Figure-Table (5th ed., 1865), were printed

under De Morgan’s superintendence. Several works edited by him

will be found mentioned in the British Museum Catalogue. He made

numerous anonymous contributions through a long series of years

to the Athenaeum, and to Notes and Queries, and occasionally to

The North British Review, Macmillan’s Magazine, &c.

Considerable labour was spent by De Morgan upon the subject

of decimal coinage. He was a great advocate of the pound and mil

scheme. His evidence on this subject was sought by the Royal

Commission, and, besides constantly supporting the Decimal

Association in periodical publications, he published several separate

pamphlets on the subject.

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