68 



INDEX 



Paragraph 



Slide rule, used in single-theodolite work ^. 103 



used in two-theodolite work 159 



Stations, single-theodolite, location of 4 



two-theodolite, location of.. 5,6,7 



Surface wind direction, how obtained _ 71 



Tables used in pilot balloon work 149 



Telephones, wiring of circuit 75 



use of . 86,87 



Theodolite, description of . 10-14 



adjustment of 22-23 



plate level 24 



collimation 25-28 



standard- 29 



vernier 30 



assembling of 16,17 



care of 20,21 



checking setting of 93 



leveling of .• 31,32 



orientation of 35 



packing for shipment 19 



setting up for observation 31-34 



Time signaler, construction of 74 



installed in telephone circuit 75 



Velocity scales 116 



Velocity direction graph, preparation of 123-127 



Vernier, description of 14 



Visibility, recording of 94,95 



Wind direction, how obtained 119, 120, 121 



Wind velocity, how measured. 118 



