|bad | | |black | | | | |surface | | | | |and | | | | |mottled | | | | |in | | | | |places | 38|Very bad |Very bad, |Poor |Black |176 |and quite |with scaling| |surface | |dusty | | |is loose| | | | |and | | | | |shatter-| | | | |ed | 39|Consider- |Slight |Good |Panel |177 |able | | |surface | | | | |quite | | | | |white | 40|Very bad |Slight |Good |Surface |178 | | | |very | | | | |white, | | | | |possibly| | | | |due to | | | | |progres-| | | | |sive | | | | |chalking| | | | |or in- | | | | |ertness | | | | |of pig- | | | | |ment | 45|Slight |Considerable|Fair |White |169 | | | |surface | 46|Slight |Slight |Fair |Consi- |170 | | | |derable | | | | |scaling | | | | |present;| | | | |surface | | | | |fairly | | | | |white | 47|Bad |Bad |Bad |Bad con-|171 | | | |dition | | | | |through-| | | | |out | ==+===========+============+======+========+=== [Illustration: Middle white panel is painted with a combination pigment formula Middle white panel is painted with pure Corroded White Lead Notice Difference in Color after Two Years' Wear] "=Recommendation.= On account of the peculiar conditions which obtain in and around Pittsburg, as exemplified by these tests, the committee finds, as a result thereof, that the best white paint for general exterior use is made of white lead combined with zinc oxide and a moderate percentage of inert pigments, such as silica, asbestine, or barytes.