Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

250 Molesworth’s pocket-book Vertical Jets. H = Head of water. h = Height of jet. D = Diameter of jet. K = Coefficient varying with ratio of dia- meter of jet to head. ft = HK. K = K = K = K = K = K = K = K = • 96 when D = H 4- 300 • 9 „ = H -4- 600 • 85 „ = H -J- 1000 • 8 -H 4-1500 • 7 • = H -r 1800 • 6 „ = H 4- 2800 • 5 = H 4- 3500 • 25 „ =11 4-4500 Force of Water in Motion Against a Plane Surface at Kight Angles to the Direction of Movement. V = Velocity of water in miles per hour. v = Velocity in feet per second. P = Pressure in lbs. per square foot. P = 2-1V2. x P = -976 For Table of Pressure, see next page.