RESULTS OF PITTSBURG TESTS 143 



laboratory for analysis. The analyses of these paints were 

 made by members of the Test Fence Committee, representing 

 the schools, and appear in this bulletin. The results obtained 

 conform very closely to the formulas which were applied to the 

 fence, a variance of only one or two per cent, being shown in 

 the amount of the different pigments." 



Second Annual Inspection of Pittsburg Test Fence. The 

 second annual inspection of the Pittsburg Test Fence was made 

 on Thursday, May 7th, 1910. The panels in Pittsburg after 

 having weathered for over two years presented an appearance 

 which allowed the making of a detailed inspection, this having 

 been found impossible during the first annual inspection. The 

 inspection party l included those master painters who repre- 

 sented the Pittsburg Master Painters' Association, who were in 

 charge of the application of the paints in 1907, 1908, and 1909, 

 together with the test fence committee from the faculty of 

 the Carnegie Technical Schools, and representatives of the 

 Scientific Section. A summary of the report issued by this 

 committee follows: 



" Two of the members of the inspection party have been 

 impressed with the lumber lottery existing in some field tests, 

 which have been conducted, and feel that when the object of a 

 test is to determine the relative value of paints, such tests should 

 be conducted on a standard grade of wood, such as white pine. 

 The use of cypress, pitch pine, and other faulty woods, is often 

 the cause of the failure of a paint, which on good wood would 

 show up well. For this reason, only the white pine panels painted 

 with white paints were considered in the inspection, the yellow 

 .pine panels and cypress panels having been thrown out of the 

 test at last year's inspection. 



" Checking, cracking, and alligatoring on the painted surfaces 

 were determined by using a magnifying glass. The degree of 

 chalking existing was decided upon by using small pieces of black 



1 A. C. Rapp, Chairman, Test Fence Committee, Pittsburg Branch, 

 Master Painters' Association; John Dewar, member Fence Committee, 

 Pittsburg Branch, Pennsylvania State Association of Master Painters; J. 

 H. James, Chairman, Carnegie Technical Schools' Test Fence Committee; 

 John A. Schaeffer, member Test Fence Committee, Carnegie Technical 

 Schools; Henry A. Gardner, Director Scientific Section, Paint Manufacturers' 

 Association of the U. S. 



