image . http://en.wikipedia.org/wiki/Image:Table_of_Pneumaticks,_Cyclopaedia,_Volume_2.jpg. Public domain. The statement about pressure is true of solids and liquids with some qualification---which we won't do here. The chemistry of system is also affected by the thermal energy per something. Caption: "An illustration of a ten-thousand-catty bronze ding-tripod being cast by Chinese metal workers, from the