Smithsonian miscellaneous collections . 39 532 S24 — 5i5 — — — — — 4000 479 470 0. 5 460 — 449 — — — — — 5ooo 424 415 — 4. 81 402 6000 377 364 — 349 — 3°- 5 — — — 7000 334 320 These data of table K are marked on the individual adiabats andthe points of equal altitude are connected with each other; we thus find that the altitudelines are also represent-ed as straight lines asshown in fig. 7; at leastthe departures there-from are so slight thatthey a r e n o t showngraphically. By comparison of thelevel lines for the twostages in figs. 6
Smithsonian miscellaneous collections . 39 532 S24 — 5i5 — — — — — 4000 479 470 0. 5 460 — 449 — — — — — 5ooo 424 415 — 4. 81 402 6000 377 364 — 349 — 3°- 5 — — — 7000 334 320 These data of table K are marked on the individual adiabats andthe points of equal altitude are connected with each other; we thus find that the altitudelines are also represent-ed as straight lines asshown in fig. 7; at leastthe departures there-from are so slight thatthey a r e n o t showngraphically. By comparison of thelevel lines for the twostages in figs. 6 and 7 wefind a slight departureonly at great altitudes;thus on the temperatureline — 300 for the line 6000 meters the departures are only 60meters. Therefore both tables can be united in a single one which canalso contain the curves of saturation, and in doing this we eithersmooth out the differences between the two systems of altitudesand choose an average system or we decide to use either one of. fig. 7. ALTITUDE LINES FOR THE CONDENSA-TION STAGE ADIABATIC CHANGES OF MOIST AIR—-NEUHOFF 479 the two by preference. The small error of i per cent in the totalaltitude will therefore be considered negligible. Such a table of adiabats and altitudes constructed on a largescale enables us to solve in the most convenient manner the mostimportant questions as to the altitudes at which certain atmos-pheric conditions occur under adiabatic expansion and as to theconditions that must be present at certain altitudes. § 12. THE ADIABATIC DIAGRAM The adiabatic diagram facing page 494 is a very practical form formost problems. The basis of this diagram is a square network andthe units of length are i° for temperature, and 100 meters for differ-ence of altitude. The diagram covers a range of temperatures from+ 300 to — 300 C. and of altitudes from o to 7000 meters. Inorder to explain its construction more conveniently the followingfig. (8) is introduc
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