10 ON THE REDUCTION OF THE 
TABLE A. 
Giving the value of WV for various temperatures and elevations, and the difference 
t 
for an additional 100 feet at each height. 
g 100 Frer. 200 FEET. 300 Fret. 400 Frrr, 500 Freer. 9 
£ £ 
d : 
a Diff. Diff. Diff. Diff. = 
FA for oid for Bi for Z for Fi 
Be | 22% Jio08t.} 4 * |100Ft. 100 ft. t J100ft.| & 
—40 | 0.4553).4573 }.0.9126|.4595 | 1.3721).4615 
| —38 |0.4529|.4549 | 0.9078|.4570 | 1.3648).4590 
36 | 0.4505|.4525 | 0.9030).4546 | 1.3576|.4566 
2.2972).4658 | —40 
1.8238)|.4612 | 2.2850|.4632 | —38 
1.8142|.4587 | 2.2729|.4607 | —36 
1.8047|.4562 | 2.2609|.4583 | —34 
1.7953).4538 | 2.2491|.4558 | —32 
—34 |0.4482).4501 ] 0.8983|.4522 | 1.3505).4542 
—32 |0.4458).4478] 0.8936) .4498] 1.3434).4519 
—30 | 0.4435).4455 ] 0.8890|.4475 | 1.3365).4494 
—28 |0.4412|.4432]0.8844!|.4452/] 1.3296 .4471 
—26 | 0.4390).4409 | 0.8799).4428] 1.3227|.4448 
—24 |0.4368).4386 | 0.8754).4406/ 1.3160) .4425 
—22 |0.4345).4365]0.8710|.4383] 1.3093 .4402 
1.7859|.4515 | 2.2374) .4534] —30 
1.7767|.4491 | 2.2258|.4510] —28 
1.7675}.4468 | 2.2143),.4487 |] —26 
1.7585).4444] 2,2029|.4464] —24 
1.7495}.4422]2.1917|.4440] —22 
—20 | 0.4324|.4342] 0.8666).4361 | 1.3027|.4380] 1.7407|.4398 | 2.1805|.4418 | —20 
—18 ]0.4302|.4320] 0.8622).4339 | 1.2961).4358 
—16 | 0.4280|.4299] 0.8579).4317 | 1.2896).4336 
—14 ]0.4259).4277 | 0.8536).4296 | 1.2832).4314 
—]2 | 0.4238)|.4256] 0.8494|.4274]1.2768).4293 
1.7319}.4376 | 2.1695).4395 | —18 
1.7232).4354] 2. 1586|.4373 | —16 
1.7146}.4332]2.1478|.4351] —14 
1.7061|.4310] 2.1371|.4329 | —12 
—10 | 0.4217).4235] 0.8452).4253|1.2705).4271] 1.6976|.4289 | 2.1265).4307 | —10 
1.6893}.4267 | 2.1160|.4286] — 8 
1.6810}.4247 | 2.1057|.4264] — 6 
1.6728).4226} 2.0954).4243]— 4 
1.6647|.4205| 2.0852).4229] — 2 
— 8]0.4197|.4214]0.8411|.4232]1.2643).4250 
— 6]0.4176|.4194]0.8370|.4211]1.2581).4229 
— 4]0.4156|.4173] 0.8329).4191 ] 1.2520).4208 
— 2]0.4136 .4153] 0.8289).4171] 1.2460).4187 
0.4116 .4133] 0.8249) .4151]1.2400).4167]1.6567|.4184} 2.0751).4202 
1,6487|.4164]2.0651).4182 
0 
2 
1.6409).4144] 2.0553'.4160 4 
6 
8 
0.4097|.4113] 0.8210 .4130] 1.2340|.4147 
0.4058).4074] 0.8132|.4091 | 1.2223}.4107] 1.6330}.4125]2.0455).4141 
0 
4|0.4077).409410.8171'.4110] 1.2281'.4128 
6 
8 1.6253].4105] 2.0358).4121 
0.4039}.4055 | 0.8094|.4071] 1.2165}.4088 
1.6177|.4085] 2.0262|.4101} 10 
1.6101|.4065]2.0166).4082} 12 
1.6026}.4046]2.0072|.4063] 14 
1.5951).4028]1.9979)}.4043] 16 
1.5877|.4009} 1.9886|.4025} 18 
12}0.4001|.4017]0.8018'.4033] 1.2051}.4050 
14] 0.3982).3999]0.7981'.4014]1.1995}.4031 
16 | 0.3964|.3980] 0.7944).3996] 1.1940}.4011 
18 | 0.3946).3961] 0.7907 |.3978 | 1. 1885}.3992 
20 | 0.3928) .3943] 0.7871 '.3959 | 1.1830).3974 
22 |0.3910|.3925] 0.7835)|.3941 | 1.1776].3956 
24 10.3892|.3908] 0.7800) .3922} 1.1722}.3938 
26 |0.3875|.3889] 0.7764).3905 | 1.1669}.3920 
28 | 0.3857|.3872] 0.7729'.3888 | 1.1617|.3902 
| 
1.5804|.3990]1.9794|.4006} 20 
1,5732|.3972]1.9704|.3987] 22 
1.5660).395411.9614/.3968] 24 
1.5589|.3935] 1.9524!.3951] 26 
1.5519|.3917] 1.9436).3932] 28 
10 | 0.4020).4036 | 0.8056).4052]1.2108).4069 
