CONTENTS 



PAGE 



MATERIALS NEEDED FOR THE EXERCISES IN THE LABORATORY. 5 

 EXERCISE 



I. THE NORTHERN SKY IN SEPTEMBER . . 9 



II. POSITION OF THE SUN AT DIFFERENT HOURS OF THE 



DAY 10 



III. ORBITS OF SOME OF THE PLANETS 11 



IV. To FIND THE VOLUME OF A REGULAR SOLID .... 12 

 V. To FIND THE WEIGHT OF A BODY BY USE OF THE PLAT- 

 FORM BALANCE, OR TRIP SCALE .......... 13 



VI. To FIND THE DENSITY OF A SOLID 13 



VII. To FIND THE CAPACITY OF A BOTTLE OR FLASK BY 



WEIGHING 14 



VIII. To FIND THE DENSITY OF A LIQUID 15 



IX. To FIND THE SPECIFIC GRAVITY OF A SOLID WHICH is 



INSOLUBLE IN WATER 16 



X. TESTING THE ACCURACY OF A THERMOMETER AT THE 



FREEZING POINT 17 



XI. QUANTITY OF HEAT 18 



XII. WEATHER OBSERVATIONS . . . . ' 19 



XIII. VARIATIONS IN TEMPERATURE SHOWN BY CURVES . . 20 



XIV. THE SIMPLE ELECTRIC CELL 21 



XV. STUDY OF GAS BURNERS AND FLAMES 23 



XVI. HEATING WITH GAS FLAMES 24 



XVII. A PRODUCT OF OXIDATION 24 



XVIII. TESTS FOR ACID, BASIC, AND NEUTRAL SOLUTIONS. . . 25 



XIX. STUDY OF ROCK FORMATIONS 27 



XX. REPRESENTING ELEVATIONS BY CONTOURS 28 



XXI. STUDY OF A TOPOGRAPHIC MAP 29 



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