WeRead Powered by ReaderPub
The aneroid barometer: its construction and use cover

The aneroid barometer: its construction and use

Chapter 12: TABLE V. BAROMETRIC PRESSURES CORRESPONDING TO BOILING WATER TEMPERATURES.
By George W. Plympton
Open in WeRead

About This Book

A practical manual introduces atmospheric principles and explains how air pressure varies, then shows methods for using barometric measurements to determine altitude. It describes the design and mechanics of aneroid instruments, gives guidance on selecting and operating them, and provides worked examples and systematic procedures for field measurements. The book includes supporting reference tables—altitude conversions, logarithms, metric tables, corrections for mercurial instruments, and boiling-point correspondences—and offers advice on instrument care and interpretation of readings for both meteorological and surveying purposes.

TABLE IV.
REDUCTION OF MERCURIAL
COLUMN TO 32° FAHR.

Brass scale to barometer correct at 62° Fahr.

 
Temp. 
°F.		   30”     25”     20”  
32 .009 .008 .006
35 .017 .015 .012
40 .031 .026 .021
45 .044 .037 .030
50 .058 .048 .038
55 .071 .059 .047
60 .084 .070 .056
65 .098 .082 .065
70 .111 .093 .074
75 .125 .104 .083
80 .138 .115 .092
85 .151 .126 .101
90 .164 .137 .110
95 .178 .148 .118
100  .191 .159 .127
 

TABLE V.
BAROMETRIC PRESSURES CORRESPONDING
TO BOILING WATER TEMPERATURES.

 
Whole Deg. Tenths of each Degree.
  .0 .2 .4 .6 .8
  in. in. in. in. in.
 183   16.317   16.389   16.461   16.533   16.605 
184 16.618 16.752 16.826 16.900 16.974
185 17.048 17.122 17.197 17.272 17.348
186 17.423 17.499 17.575 17.652 17.729
187 17.806 17.883 17.961 18.039 18.117
188 18.195 18.274 18.353 18.432 18.512
189 18.592 18.672 18.753 18.833 18.914
190 18.996 19.077 19.159 19.241 19.324
191 19.407 19.490 19.573 19.657 19.741
192 19.825 19.910 19.995 20.080 20.166
193 20.251 20.338 20.424 20.511 20.598
194 20.685 20.773 20.861 20.949 21.038
195 21.126 21.216 21.305 21.395 21.485
196 21.576 21.666 21.758 21.849 21.941
197 22.033 22.125 22.218 22.311 22.404
198 22.498 22.592 22.686 22.781 22.876
199 22.971 23.067 23.163 23.259 23.356
200 23.453 23.550 23.648 23.746 23.845
201 23.943 24.042 24.142 24.241 24.341
202 24.442 24.542 24.644 24.745 24.847
203 24.949 25.051 25.154 25.257 25.361
204 25.465 25.569 25.674 25.779 25.884
205 25.990 26.096 26.202 26.309 26.416
206 26.523 26.631 26.740 26.848 26.957
207 27.066 27.176 27.286 27.397 27.507
208 27.618 27.730 27.842 27.954 28.067
209 28.180 28.293 28.407 28.521 28.636
210 28.751 28.866 28.982 29.098 29.215
211 29.331 29.449 29.566 29.684 29.803
212 29.922 30.041 30.161 30.281 30.401