Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

( 716 ) INDEX. PAGB Abutments .............109 •-------—• Loads on .. 168 Accidents, Railway.. .. 236 Accumulated Work ,. 384 Acreage, Computation of 2 Adhesive Power of Loco- motives .. ............224 Admiralty Knots .. .. 5«6 -------Tests for Iron 31 -------for Steel 28 Air, Efflux of--547 ------Friction of, in Tubes 457 Ale anil Beer Measure .. 582 Algebraic Formula;.. .. 608 ---------- Signs .. .. «07 Alloys, Composition of .. 422 ----------for Cari iage Bear- ings ..................229 -------Strength andWeight of......................16 Alphabet, Telegraph .. 302 American Bridges,Loads on 159 ---------Strains 159 ------------------ Money .. .. 602 ■——-------- Truss Bridge .. 178 Aneroid, Levelling with .. 12 Angle 75°, to Construct without Protractor .. 394 Angle-iron, Strength of .. 140 ------Weight of .. 40 Angle, Setting out Right 3 ----------Supplement of .. 615 Angles of Machine Cutters 44 o ----------of Roofs ..------..141 ■-------------------------- of Slopes .. .. 83 •----- Plotting of .. .. 1 Tangential .. ..217 -----------------------------Useful for Curves 218 Animal Power...........529 PAGE Annuities .. .. .. .. 611 Antifriction Grease .. .. 424 Arches, Braced..........181 -------- Expansion in Iron 182 ------Line of Equilibrium 180 110 108 ------Skew ------Thickness of .. Arcs, Length of, by Ver- sines and Chords .. .. -----Length of, by Angles Area of Chimneys .. .. -----Plane Triangles.. -----Safety-valves .. ------ Tubes .. .. u . Areas of Circles, 8th .. *---------------10th .. 678 676 472 616 490 457 661 665 ----Small Circles, 32 nd 660 ' " 664 660 656 272 613 577 136 440 580 403 228 I------------------10 th I-----'■---------B.W.G. I— Segments .. .. I-------of Sewers .. .. Arithmetical Progression Armstrong Shell .. .. Asphalte Flooring .. .. Augers, Machine .. ., Avoirdupois Weight .. Axles, Friel ion in .. .. ------Railway .. .. Balancing Locomotives .. 516 Baling..................2H0 Balla t ................202 Balloons ...............365 Balls, Weight of .. .. 51 Bar Iron, Weight of .. 37 Barometer, Capillarity of 33 Levelling with 12 Barometric Heights .. .. 13 Wave .. .. 14