Annual Report of the Secretary of War, Volume 4

according accuracy adopted altitude amount anemometer angle apparatus apparent applied approximately arms assumed atmospheric axis balance barometer becomes body boiling bulb causes cistern cloud coefficient column comparison computed condition considered consists constant construction correction corresponding cups density depends described determined direction distance effect equal equation error expansion experiments expressed fixed fluid force formula friction given gives glass heat horizontal inches increase indicated International known latter length light liquid lower means measured mercury meters method motion moving normal observations obtained ordinary plane plate portion position present pressure quantity radiation reading records reduced relative represented resistance respectively rise rotation scale shown shows side similar square standard surface temperature term thermometer tion true tube unit upper vane vapor varies velocity vertical volume weight whirling wind zero