4 
1 
(7/(1// of ,'/<//(//<//<•{/ ! (//>(>// /s 
i//n.\/rti/>/iif //tr i/f/if/ii/ /till- of //ir-ir t/msi/v. 
I’-xplaiKItioil . T/te aftsm-ations tirr srvrrtiOy mtn-hfti by' srna// 
rv>*r/Ar,(o®} fjf rt\KWM,{*) tonb tbr pos/ttun (O' oiOt <(H t/ir 
Oiori /> /}.nr/ Ay (v„nli'„„lr.( as fidhays. TAc /(anxan/a/ caardinaA 
or oAtassa is (hr si/iiiirr rant oO fAr G . tnii/irratiirr iv/iasr xrra is sit 
anted at ■/rd’‘faAr. /briny the sera n/yasmus tension orcordiny to 
tbe ob.teryations of Rudbety / tbe unit o/'tbr.te nbsassie is upon Ms fbort 
finebes. Thus ta^Tarh . ,s M-t » G. and VdM-J/ the lenyth of the a/ur 
(.(SO representiny 'ea** in units' of ^ in. The ueeHieoI coordinote is the siith 
raotofdie densiti at' the yapaur at the rrspertive temperature. This density 
IS found thorn the abseryed tension or etnstir torre in inrhes ofrnermrv 
by diyidmy the .tame by the G; temp. The sijrth root of the tfuadent is ‘ 
liien laid off as the yertiou l coordinate to a scale mhieh in that chart 
has unity rtpual to inches . 
The djspasitian ot'each series ofubseryations to ranye itself in a struityld 
Ime upon t/us pra/ection is the mani/kontian ofthryeneral tan- i 'is. That 
the sia-th root of the dentity of a saturated yapaur yirries as the si/uitre 
root of the G. temp, minus a eonstant - v? - g . 
In the rase of the smalt circles irhieh sheu- M Dcsprettt obseryalions on 
the earpanswn of Heater from its paint of musimum densi^ at to ttt° 
the ahsciaw as before consist, of the sipiare root of the r.rrrss of the 
vnbime abaye the constant -ORH/i .the yolumr at 30 '’ bniut tahen gs 
unity. The unity of the .vca/e of ordinates is Voai-O 007 imhrs. 
Sreytn.de f'hem. t.Ixx.. 
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