flow measurement discharging into the reservoir tank. A set of pressure taps along the Venturi wall provide the pressure distribution along the length of the convergent-divergent passage. Each tap is connected to a vertical manometer tube mounted in front of a scale for direct readings of pressure head difference in millimeters of water. The manometer tubes connect at their top ends to a common manifold that has a small air valve. The hand pump (attached to the side

discharging into the reservoir tank. A set of pressure taps along the Venturi wall provide the pressure distribution along the length of the convergent-divergent passage. Each tap is connected to a vertical manometer tube mounted in front of a scale for direct readings of pressure head difference in millimeters of water. The manometer tubes connect at their top ends to a common manifold that has a small air valve. The hand pump (attached to the side discharging into the reservoir tank. A set of pressure taps along the Venturi wall provide the pressure distribution along the length of the convergent-divergent passage. Each tap is connected to a vertical manometer tube mounted in front of a scale for direct readings of pressure head difference in millimeters of water. The manometer tubes connect at their top ends to a common manifold that has a small air valve. The hand pump (attached to the side discharging into the reservoir tank. A set of pressure taps along the Venturi wall provide the pressure distribution along the length of the convergent-divergent passage. Each tap is connected to a vertical manometer tube mounted in front of a scale for direct readings of pressure head difference in millimeters of water. The manometer tubes connect at their top ends to a common manifold that has a small air valve. The hand pump (attached to the side discharging into the reservoir tank. A set of pressure taps along the Venturi wall provide the pressure distribution along the length of the convergent-divergent passage. Each tap is connected to a vertical manometer tube mounted in front of a scale for direct readings of pressure head difference in millimeters of water. The manometer tubes connect at their top ends to a common manifold that has a small air valve. The hand pump (attached to the side discharging into the reservoir tank. A set of pressure taps along the Venturi wall provide the pressure distribution along the length of the convergent-divergent passage. Each tap is connected to a vertical manometer tube mounted in front of a scale for direct readings of pressure head difference in millimeters of water. The manometer tubes connect at their top ends to a common manifold that has a small air valve. The hand pump (attached to the side discharging into the reservoir tank. A set of pressure taps along the Venturi wall provide the pressure distribution along the length of the convergent-divergent passage. Each tap is connected to a vertical manometer tube mounted in front of a scale for direct readings of pressure head difference in millimeters of water. The manometer tubes connect at their top ends to a common manifold that has a small air valve. The hand pump (attached to the side discharging into the reservoir tank. A set of pressure taps along the Venturi wall provide the pressure distribution along the length of the convergent-divergent passage. Each tap is connected to a vertical manometer tube mounted in front of a scale for direct readings of pressure head difference in millimeters of water. The manometer tubes connect at their top ends to a common manifold that has a small air valve. The hand pump (attached to the side discharging into the reservoir tank. A set of pressure taps along the Venturi wall provide the pressure distribution along the length of the convergent-divergent passage. Each tap is connected to a vertical manometer tube mounted in front of a scale for direct readings of pressure head difference in