91 



Paragraph 



Scale of barometer , 11 



contracted 19 



polished . 128 



errors and capillarity, correction for 174 



of elevations on aneroid, how used 106 



feet on aneroid, adjustable, how used 106 



only approximate 105 



Sea level, reduction of barometer to 103, 181 



Serviceable barometers, how shipped 149 



Shipment of empty barometers 151 



serviceable barometers 149 



Siphon barograph, Marvin system 72, 87 



barometer 3 



magnifying 66 



Spiral barometers 62 



Standard gravity, reduction to 102, 197 



Station elevation 168, 169, 174 



Straining cistern of barometer 111, 114 



Sum of corrections defined 174 



Surveyor to be informed concerning levels 165 



Sympiesometer 64 



Temperature, correction for 41, 43, 174, 195 



Thermometer attached 8 



Time error of barographs checked 158, 192 



Torricelli's barometer 2 



"Total correction" defined 171, 174 



entered on Form No. 1001-Metl 171 



Tube of barometer to be cleaned 128 



Unpacking barometers 111 



Unserviceable barometers, how shipped 151 



Vernier of barometer 12 



adjustment of 98 



Yerticality of barometers 90, 92, 99 



Water barometer 60 



Weighing barographs 69 



Winding clocks for barographs 146 



Wrench required for cleaning Tuch cisterns 143 



o 



