NO. 8 WATER-VAPOR TRANSPARENCY FOWLE 49 



Table 12. — Transmission of Liquid Water (i cm.) .8 to 2.8 m 



W. Schmidt ' in his " Absorption der Sonnenstrahlung im Was- 

 ser " gives computations based upon the data of Aschkinass shown in 

 figure 16. He gives the transmission for various thicknesses of 

 water and states that a layer i,ooo m. thick produces complete absorp- 

 tion for wave-lengths greater than 0.6 fx, 10 m. for those greater than 

 0.9 fji, 10 cm. for those greater than 1.2 /a, i cm. for those greater 

 than 1.5 /A and i mm. for those greater than 2.4 /x. It should be 

 remembered that his results are from computation. Because of the 



Fig. 16.— Absorption of radiation by liquid water. Aschkinass, Annalen der 

 Physik und Chemie, 55, p. 401, 1895. Abscissae are wave-lengths in microns 

 (/*). Ordinates are percentage transmissions. 



impurity of the spectrum used to obtain the transmission of vapor, 

 and the banded nature of the absorption, such computations based 

 on Bouguer's formula are doubtful, and inferences obtained from the 

 curves of figure 16 would probably be as satisfactory. 



(2) ABSORPTION BY LIQUID WATER, WAVE-LENGTHS I [X TO 8 H 



In figure i6 will be found a portion of the data obtained by 

 Aschkinass for layers of water ranging from o.ooi cm. to lOO cm. 

 thick. The curve continues on nearly horizontally from 7 to 8 ju,. 

 The data will be found given in much greater detail in the original 

 pubHcation.^ 



^ Sitzungberichte K. Akad. der Wissenschaften, 117, 2 A, p. 237, i( 

 ^ Annalen der Physik und Chemie, 55, p. 401, 1895. 



