Answers to the practical questions and problems contained in
A stone weighs 70 lbs. in air and 50 in water [Whal is its bulk? 70 -50 = 20. 20 x 16 oz. = 320 oz., the weight of water displaced. 320 oz. is 8/25 of a cu. ft. 38. A hollow ball of iron weighs Io lbs.: what must be its bulk, to foat in water? 10 lbs. = 160 oz.