Practical physics, molecular physics & sound

Front matter

HANDBOOKSfor Students andGcneml Readers

UC-NRLF

GUTHR1E

Author's Preface

I HOPE that the following outlines of Practical Physics, including Molecular Physics, Waves, Sound, Light and Heat, may be of use to those Teachers and Students who wish to give or to get more than a mere wordknowledge of the matter. Such knowledge alone no more gives its owner a right to be reckoned a Physicist than does a knowledge of sound and harmony entitle him to be called a Musician, or a knowledge of perspective and colour to the name of Artist.

It has been the strong wish and effort of some few Physicists of late years to bring practical work into their teaching, and thus to do for Physics what has been for so long done for Chemistry with great gain. For it seems that knowledge got by the head alone is often very fleeting : whereas when head and hand learn together, the power of keeping is strengthened. And we look upon such practical teaching as good, not only because it is the only way to forge the link by which man is bound to nature, but also because it forms the one discipline of truth in the ways of

matter.

FREDERICK GUTHRIE.

LONDON, 1878.

Contents

COHESION OF SOLIDS.

SUCTION PAOB

1-7. Hardness. — Form-Elasticity. — Tenacity. —

Appendix

111-115. The vernier. — Parchment paper. — Hints on glass working. — To etch a scale on glass. — The siphon barometer. . . . 125-133

ELEMENTARY EXPERIMENTS RELATING TO

SOUND AND WAVES .... 134-150

APPARATUS AND MATERIAL FOR EXPERI- MENTS IN SOUND AND WAVES . . 151-154

Index

PRACTICAL PHYSICS.