NO. I AIR AND TUBERCULOSIS HINSDALE 57 



depressing and relaxing as the heavy misty weather observed in 

 central and western Virginia mountain valleys during the rains of 

 early summer and autumn, certainly not so depressing as the relax- 

 ing moisture of the tropics. The California fogs have been likened 

 to the Scotch mist. They never deter the fishermen from curing 

 their fish on their racks along the seashore. Raisins and other fruit 

 are dried in the open fields and residents claim that during the 

 rainiest weather nothing molds or rots. (P. C Remondino.) 



Mr. Ford A. Carpenter, of the U. S. Weather Bureau, has published 

 an interesting book, in which he gives a lucid description of the fogs 

 of the Pacific Coast.* He shows that on that coast the maximum 

 fog is reached in San Francisco, with moderately high averages 

 north to the Canadian boundary and decreasing in frequency and 

 duration with the latitude, San Diego having the least on the coast. 

 He says that daylight fogs are practically unknown in San Diego. 

 A " day with fog " is one on which there is one hour or more of 

 fog dense enough to obscure objects one thousand feet distant. At 

 San Diego the hours of greatest frequency were between eleven at 

 night and six in the morning. Mr. Carpenter notes the beneficial 

 effect of California fogs and says that it is impossible to measure 

 accurately the amount of moisture conveyed by fog. There is no 

 doubt that over a region covered by vegetation exposing a natural 

 condensing surface, such as eucalyptus, palm, iceplant, etc., not less 

 than a ton of water to the acre is thus distributed during the preva- 

 lence of every dense fog. It also checks evaporation. 



" It is not fog in the generally accepted meaning, for this ' light 

 veil ' is neither cold nor excessively moisture-laden. Neither is it 

 high, for its altitude is less than a thousand feet. To one who has 

 spent a few weeks of spring, summer or fall in southern California, 

 the picturesque description of the musical Spanish el veto is quickly 

 recognized as both expressive and truthful." " El velo de la lus " : 

 " the veil that hides the light." " Velo qui cubre la lus del so " : 

 "The veil which shades (covers) the light of the Sun." "El velo 

 de la manana " : " The veil of the morning." 



There is probably no place on the entire coast line of the United 

 States that offers so many climatic advantages for tuberculous 

 patient as San Diego and its attractive neighbor, Coronado. 



It is a mistake to believe that because there is fog, the humidity 

 is necessarily high during its presence. The United States Weather 



^ The climate and weather of San Diego, California. San Diego, 1913. See 

 Review in Journ. Royal Meteorological Society, Jan., 1914. 



