Vi CONTENTS. 



20. 



1 6. Logarithms of -^ (hyperbolic cosines) for values of x from o to 5 42 



17. Values of c* and e~* and their logarithms for x from o to 10 



18. " " log. ? for values of x from i o to 30 . . . 



19. " " e* and e' 3 * and their logarithms . . . . 



" " 4 " " " 



21. " " e 4 and* * ..... 



22. " " ** and <r-* and " " for fractional values of x 



23. Probability of errors of observations : probability integral . . 



n A << << " < 



24. . . 



25. Values of 0.6745 ~^ 



26. " " ' 6 745 ^-^ri 



29. Inverse of probability integral. Diffusion ...... 



30. Logarithms of the gamma function T(n) for values of n between i and 2 



31. Values for the first seven zonal harmonics from = o to # = 90 . 



32. " " log. M/q.Tr^/aa 1 for facilitating the calculation of the mutual 

 inductance between two coaxial circles . . . . . . 



33. Value fory 2 (i sm*0sin?<) } d<l> for different values of ; also the 



corresponding logarithms ......... 



34. Moments of inertia, radii of gyration, corresponding weights 



35. British standard wire gauge : diameters, sections ..... 



36. Birmingham wire gauge " " ..... 

 (For Brown and Sharp gauge, see tables 40 and 41) 



37. Cross section and weights of wires (copper, iron, brass), British units . 



38. " " " " " " " " " metric units . 



39. " " " " " aluminum wire: British and metric units . 



40. Size, weight and electrical constants of copper wire, Brown and Sharp 



gauge : common units ......... 



41. Same as table 40, but in metric measure ...... 



42. Weight in grammes per square metre of sheet metal .... 



43. " " various common units of sheet metal ..... 



44. Strength of materials : (a) metals ...... 



(b} stones . . ..... 



(f) brick ........ 



(d} concretes ....... 



45. " " " timber tests ....... 



A f. a a ti (i 



40. . ... 



47. Moduli of rigidity . ..... . . . 



