Physics · In English · 1890
Spinning Tops
Why a spinning top stands up, how the Earth wobbles and how gyroscopes work: John Perry explains tricky mechanics with toys.
18 chapters · about 2 h of reading
Opening the book
How the book begins
At a Leeds Board School last week, the master said to his class, "There is to be a meeting of the British Association in Leeds. What is it all about? Who are the members of the British Association? What do they do?" There was a long pause. At length it was broken by an intelligent shy boy: "Please, sir, I know—they spin tops!"[1]
Now I am sorry to say that this answer was wrong. The members of the British Association and the Operatives of Leeds have neglected top-spinning since they were ten years of age. If more attention were paid to the intelligent examination of the behaviour of tops, there would be greater advances in mechanical engineering and a great many industries. There would be a better general knowledge of astronomy. Geologists would not make mistakes by millions of years, and our knowledge of Light, and Radiant Heat, and other {10} Electro-magnetic Phenomena would extend much more rapidly than it does.
I shall try to show you towards the end of the lecture that the fact of our earth's being a spinning body is one which would make itself known to us even if we lived in subterranean regions like the coming race of an ingenious novelist.[2] It is the greatest and most persistent cause of many of the phenomena which occur around us and beneath us, and it is probable that even Terrestrial Magnetism is almost altogether due to it. Indeed there is only one possible explanation of the Vril-ya ignorance about the earth's rotation. Their knowledge of mechanics and dynamics was immense; no member attending the meeting of the British Association can approach them in their knowledge of, I will not say, Vril, but even of quite vulgar electricity and magnetism; and yet this great race which expresses so strongly its contempt for Anglo-Saxon Koom-Poshery was actually ignorant of the fact that it had existed for untold generations inside an object that spins about an axis.
Contents
- 01Preface
- 02Spinning Tops (1/2)
- 03Spinning Tops (2/2)
- 04Wall Sheet (1/4)
- 05Wall Sheet (2/4)
- 06Wall Sheet (3/4)
- 07Wall Sheet (4/4)
- 08Argument
- 09The Use of Gyrostats
- 10Appendix II
- 11The Romance of Science
- 12Early Britain
- 13Fcap. 8vo, Cloth Boards, 2s. Each
- 14Fcap. 8vo, Cloth Boards, 2s. Each
- 15Fcap. 8vo, with Map, Cloth Boards
- 16Small Post 8vo, Cloth Boards
- 17Non-Christian Religious Systems
- 18London: Northumberland Avenue, W.c. 43 Queen Victoria Street, E.c
About this edition
Public domain: the author died in 1920, more than seventy years ago, and the book was first published in 1890. It is free to read, copy and share in the EU, Russia and the United States.
We removed the source's wrapper, rejoined the lines and split the book into chapters. The words are the author's.