ANSWERS 319 



17. 11, 200 cub. in. 



18. 4-2 



19. 128 : 135. 



CHAPTER IX. 



<>. 12,000; j^ths. 



7. 200. 



8. 16 hrs. 



9. 118,800 ft. Ibs. 



10. 942f ft. Ibs. 



11. 24,000 ft. Ibs. 



12. 250 ft. poundals or %$ ft. Ibs. 



13. 300 ft. Ibs ; 300 ft. Ibs. 



14. 2250 ft. Ibs. ; 120 J 2 ft. per sec. 



CHAPTER X. 



19. Temperature of the mixture would have been le-ss. 



20. Water will melt more ice than the lead. 



21. (a) 60 degrees, (b) 55 degrees. 



CHAPTER XVI. 

 7. 15 vols. 



ERRATUM. 



P. 42, Questions. For "five miles an hour," read, "five times 

 an hour." 



