60 MISCELLANEOUS QUESTIONS. 



8. How would it affect the action of a siphon if it ivere 

 carried up a mountain ? 



9. If a vessel of water containing a floating body be 

 placed under the receiver of an air-pump, and the air 

 gradually exhausted, what will be the effect on the floating 

 body? 



10. How will it change the height of the column of 

 mercury in a barometer to incline the tube ? 



11. In the image of a written page seen in a mirror, 

 why does the writing seem to slope ? 



12. Why does a coin placed in a tumbler look larger 

 when the glass is full of water than when it is empty ? 



13. Two bodies of different volume iveigh the same in 

 water ; which will weigh the more in mercury, the larger 

 or the smaller ? 



14:. How does the wind drift sand, snow, etc. ? 



15. Why does oil " still troubled waters" ? 



16. Why does crouching down at the highest points in 

 a swing, and standing up at the lowest point, increase the 

 velocity ? 



17 What difference would it make in the guinea-and- 

 feather experiment to force into the tube additional air, 

 instead of exhausting it, as ordinarily done ? 



