Seyfert Galaxies
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Vectors, Tensors and the Foundations of Physics
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An Ancient Astronomical Treatise Reading the AlmagestON SALE
Lute News
Twisted fluorocarbon strings
No. 143 / October 2022
Article Twisted fluorocarbon stringsTRANSLATION
About the site name
Ezo （蝦夷） is the old name for Hokkaido, the northernmost of Japan's main islands, used before the island was formally renamed in 1869. The Latin form ezoensis — “of Ezo” — survives to this day in the scientific names of species native to the island. Librarivm Ezoensis is simply the library of Ezo.
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Seyfert Galaxies
By KANEKO Noboru / Chijin Shokan, “Nebulae and Star Clusters” series
セイファート銀河（地人書館「星雲星団シリーズ」）
More than forty years have passed since this book was published in 1983, and there are no plans to reissue it. It is made available here with the consent of the author, KANEKO Noboru, and the permission of the publisher, Chijin Shokan .
You are free to download it for educational and research purposes.
For commercial use of this data, or to republish it elsewhere, please write to the address at the foot of this page.
The English edition was translated from the Japanese original with the help of AI, and has not been checked line by line by a human translator. Where precision matters — equations, figures, cited values — please refer to the Japanese edition, or to the original scan, which reproduces the printed pages exactly but carries no searchable text.
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Vectors, Tensors and the Foundations of Physics
By KANEKO Noboru and YAMAMOTO Masashi / 8th revised edition, 24 August 2026
ベクトル・テンソルと物理学の基礎 第8改訂版
The first half introduces the wedge product and wedge derivative into vector and tensor analysis, extending the formalism so that it applies in any number of dimensions. Building on this, the second half treats the rudiments of mechanics, fluid dynamics, elasticity, electromagnetism, thermodynamics and radiation.
Kindle Unlimited members can read the ebook edition at no extra cost.
Published in Japanese. Sold through Amazon.co.jp.
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Reading the Almagest
By KANEKO Noboru / 19 October 2020
古代の天文学書 アルマゲストを読み解く
A complete modern reading of the Almagest , written by Claudius Ptolemy in the second century and long regarded as the greatest of astronomical works, bringing the astronomy of antiquity back to life for present-day readers.
Kindle Unlimited members can read the ebook edition at no extra cost.
Published in Japanese. Sold through Amazon.co.jp.
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Twisted fluorocarbon strings
By KANEKO Noboru / Letters, Lute News No. 143, October 2022, The Lute Society
On making twisted fluorocarbon strings for the lower courses of renaissance and baroque lutes and the theorbo, with a jig for use with a hand-twisting machine and a formula for estimating string tension.
The original English text may not be reproduced here. Back issues of Lute News are available from The Lute Society. The Japanese translation is by the author.