Vlll ELEMENTS OF LABORATORY WORK 



PAGE 



20. Practical measurement of the paths of moving bodies . . .23 



21. Observation of rotation .24 



Additional exercises and questions 26 



22. Rate of change of position .26 



23. Change of speed or acceleration 27 



24. Measurement of time . .27 



25. Resultant of two simultaneous displacements . . . .28 



26. Further consideration of simultaneous displacements . . .29 

 Additional exercises and questions 30 



27. Examples of mechanical constraint of motion . . . .31 



28. Conversion of circular into rectilinear motion . . . .32 

 Additional exercises and questions 34 



CHAPTER III 



OBSERVATIONS OP CHANGES OF TEMPERATURE 



29. Change of temperature causes change of density . . .35 



30. Standard temperatures ........ 36 



31. Relation of temperature-changes L to quality and quantity of 



matter 38 



32. Equal quantities of ice melted during equal temperature-changes 



in equal quantities of the same kind of matter . . .39 



33. To measure the corresponding temperature-changes in water and 



copper 40 



Tables of numbers expressing the relative quantities of various 

 kinds of matter which are equivalent in thermal change . 43 



34. To measure the numerical value of the temperature-change occur- 



ring in surrounding bodies when one gram of ice liquefies . 43 



35. To measure the numerical value of the temperature-change in- 



volved in changing 1 gram of water at 100 into steam at 100 45 

 Table showing the number of grams of water which would be 



changed from 1 C. to C. by the fusion and also by the 



vaporisation of 1 gram of various kinds of matter . . .46 



Table of melting-points of various solids 47 



Table of boiling-points of various liquids . . . . .47 

 Table showing the density and volume of mercury at various 



temperatures . . .' 47 



Table showing the density and volume of water at various 



temperatures 48 



Table of mean coefficients of cubical expansion . . 48 

 Additional exercises and questions 49 



