528 PHALEN. 



uniform throughout the lot. Garments were washed and dried under 

 varying conditions to test the stability of the dye. The first washing 

 gave a distinctly red color to 'the water; however, this apparently was 

 due to an excess of the dye, as the garments were not materially changed 

 in color. Subsequent washings gave very little coloration to the water. 

 The jean drawers lost their color faster than the softer undershirt. 

 When the clothing was dried in the shade very little fading took place, 

 but when- exposed while wet to the sunlight the loss of color was very 

 rapid. Here, too, the jean drawers lost color more rapidly than the 

 undershirts. At the beginning of the experiment, garments were sub- 

 mitted to a local dyer for test, and he reported that they met the 

 requirements of the soap' and soda tests as recognized by the trade. The 

 hat linings were not of a fast color; the first washing removed the 

 greater part of the dye. As the washing of these articles was not 

 contemplated, this was no great objection, except that rain and perspira- 

 tion caused the color to run. 



In actual use this clothing lost some color in a very short time. After 

 a few months the garments presented all shades, from that approximating 

 the original to a dirty cream-color. The same garment usually gave 

 a variety of tints in proportion to the relative exposure to the sun. 

 The red coloring matter was less resistant than the yellow, the first 

 change being a rapid one from orange-red to yellow and then gradually 

 to cream-color. The garments retained their color much better upon the 

 inner than on the outer surface, showing the influence of direct sunlight 

 upon the dye, and the much greater importance of this factor than that 

 of the washing. 



As the weight of these garments has been a matter of criticism, it 

 will be of interest to note that by weighing a large number of the 

 undershirts, both colored and white, it was found that there was an 

 average increase of but one-fifth of an ounce due to the dyeing. As the 

 colored drawers and those issued to the control were of different types, 

 a like comparison was not possible, but the colored drawers averaged. 

 1.2 ounces heavier than the white. 



SUMMARY OF OBSERVATIONS. 



The ' experiment, in accordance with instructions, was continued 

 throughout the year 1909, the records being kept upon a blank furnished 

 by the Board for Study of Tropical Diseases. . By the end of the year 

 the records, including those from outside sources, were completed. 

 The several items contained upon the cards will be taken up serially and 

 any discrepancies between the two groups pointed out as they come up, 

 but the discussion of their significance will be withheld until the summary. 



Weight. — The "tables here given show comparative weights at three 



