CONTENTS. XI 



TABLES. 



1. For converting U. S. Weights and Measures — Customary to 



Metric 2 



2. For converting U. S. Weights and Measures — Metric to Cus- 



tomary 3 



3. Values of reciprocals, squares, cubes, square roots, cube roots, 



and common logarithms of natural numbers 4-22 



4. Circumference and area of circle in terms of diameter d . . . 23 

 c;. Logarithms of numbers, 4-place 24-25 



6. Antilogarithms, 4-place 20-27 



7. Natural sines and cosines 28-29 



8. Natural tangents and cotangents Z'^-Z^ 



g. Traverse table (differences of latitude and departure) .... 32-47 



10. Logarithms of meridian radius of curvature in English feet . . 48-56 



1 1 . Logarithms of radius of curvature of normal section in English feet 5 7-65 



12. Logarithms of radius of curvature (in metres) of sections oblique 



to meridian 66-67 



13. Logarithms of factors for computing spheroidal excess of triangles 



(unit = English foot) 68 



14. Logarithms of factors for computing spheroidal excess of triangles 



(unit = the metre) 69 



15. Logarithms of factors for computing differences of latitude, longi- 



tude, and azimuth in secondary triangulation (unit = English 



foot) ; 70-73 



16. Logarithms of factors for computing differences of latitude, longi- 



tude, and azimuth in secondary triangulation (unit = the metre) 74-77 



17. Lengths of terrestrial arcs of meridian (in English feet) . . . . 78-80 



18. Lengths of terrestrial arcs of parallel (in English feet) .... 81-83 



19. Co-ordinates for projection of maps, scale = 1/250000 . . . . 84-91 



20. Co-ordinates for projection of maps, scale = 1/125 000 .... 92-101 



21. Co-ordinates for projection of maps, scale = i/i 26 720 . . . . 102-109 



22. Co-ordinates for projection of maps, scale :^ 1/63 360 .... 110-121 



23. Co-ordinates for projection of maps, scale = 1/200000 . . . . 122-131 



24. Co-ordinates for projection of maps, scale = 1/80000 .... 132-141 



25. Areas of quadrilaterals of the earth's surface of 10° extent in lati- 



tude and longitude 142 



26. Areas of quadrilaterals of the earth's surface of 1° extent in lati- 



tude and longitude i44-i45 



27. Areas of quadrilaterals of the earth's surface of 30' extent in lati- 



tude and longitude 146-148 



28. Areas of quadrilaterals of the earth's surface of 15' extent in lati- 



tude and longitude i5°-''54 



29. Areas of quadrilaterals of the earth's surface of 10' extent in lati- 



tude and longitude iS^-^SQ 



30. Determination of heights by the barometer (formula of Babinet) . 160 



31. Mean astronomical refraction 161 



