SCIENTIFIC READINGS. 121 



HYDROSTATICS AND HYDRAULICS. 



222. Define Hydrostatics and Hydraulics. 



223. How are fluids divided? 



224. How do fluids press ? 



225. How much greater will be the pressure of a body 

 of water of a cylindrical shape than of a body of a co- 

 nical shape, provided their bases are equal ? 



*224. Give an example of the astonishing effect that 

 might be produced by the perpendicular pressure of a 

 small body of water. 



*225. What causes the sides of canals to be sometimes 

 blown up ? 



226. What is meant by Specific Gravity ? 



227- In reference to what other body is the specific 

 gravity of bodies given ? 



228. If a body sink in a fluid, what quantity of the 

 fluid will it displace ? 



22Q. If a body swim in a fluid, what quantity of the 

 fluid will it displace? 



230. What is the name of that instrument by which 

 the specific gravity of bodies is ascertained ? 



23 1 . How is the specific gravity of a body that stcims 

 in water ascertained ? 



232. How is the specific gravity of a body that sinks 

 in water ascertained ? 



233. Had the ancients a knowledge of Hydraulics ? 



234. How did the ancients convey water from the top 

 of a hill, or other elevated place, to the top of another 

 hill? 



*235. To what science does the construction of mills 

 belong ? 



236. Why cannot water be raised in a sucking pump 

 beyond a certain limited height ? 



23?. Describe the Sucking Pump. 



238. Describe the Forcing Pump. 



239. Is the height limited to which water may be 

 thrown by a forcing pump ? 



240. Describe the Siphon. 



241 . Why must the siphon be exhausted of air before 

 it will act ? 



