MEMORANDA.

Base Computations. Corrections: 1. For Standart

                                                         2.  "    Temperature
                                                         3.  "    Inclination
                                                         4.  "    sag
                                                         5.  "    Height above sea

(2) Steel expands 625/10,000000 (.00000625) of its length for 1(degree) Fahrn

(4) Sag Let s = Correction for sag

                     l = length in feet between supports
                    w = weight of tape in lbs
                     t = tension applied in lbs

                                s = l w2/2t2 approx

(5) Reduction of Measurements To Mean Sea Level h = mean ht. ab. sea level R = rad. Earth (20,900,000 ft) Corr = h/R x length of base Measured Length say 5301 Altitude 4520' Correction = -4520x5301/20,900,000 = -1.146'

19:35, 17 May 2015 (PDT)19:35, 17 May 2015 (PDT)19:35, 17 May 2015 (PDT)65.61.234.59

Contour Intervals 50/Inches To Mile

Practical Astronomy

Parallax in attitude is the angular depression of a celestial body, in consequence of its being seen from the surface instead of center of the earth

            ASC-LTSU -- Parallax in attitude
              Always additive

When @ is on the horizon, depression or parallax greatest - "Horizontal Parallax" (of sun abt 9" Astronomical Refraction 0 at Zenith 34' at Horizon

________________________________________ 27th November 1914 - Pass Medical Examination & Enlist for Active Service Cop B. 88th Victoria Fusiliers ________________________________________

BC Archives, MS-0392 FRANK SWANNELL PAPERS Box 1 Diary and enclosures, 1915 Volume 4