I'sjiflt roiiH'l rif Form (il<i. H^^ 



The errors in the two formulae are never far ditt'erent ; sunmiinf!: 

 them without repfard to si<i:n the results are 27.12 and 27.05. for the 

 1(W iil)ticrvations, so that the averajje errors are indistinp-uishable 

 from one another. The same is true of the probable errors deduced by 

 leiast squares, beinjj: 0.229 mm. in each case. 



Tlie correspondinp- values of humidity with the errors of each are 

 triven in the foUowinj:' table : — 



