180 The Farmstead 



colors of the paints he uses to two, being care- 

 ful that they are in harmony, one with the 

 other, and with the character of the house and 

 its surroundings. 



The following figures show the comiDOsition of 

 some common paints (Xo. 1 was analyzed at the 

 Cornell Exp. Sta., the others at the Iowa Station) ; 



I. The paint known as white lead, when pure, 

 is a basic carbonate of lead mixed in oil. A 

 sample showed— 



White lead 93.62fo 



Oil and undetermined 6.38% 



There was no evidence of adulteration. 



II. White lead- 

 White lead 41.12% 



Barium sulfate 30.29% 



Zinc oxide 28.59f« 



Adulterated with barium sulfate and zinc oxide. Barium sul- 

 fate is very heavy; in fact, in nature it is known as heavy spar. 



III. Venetian red, dry — 



Ferric oxide 24.12% 



Calcium carbonate \ 66 36f 



Calcium sulfate i 



Undetermined 9.52% 



Adulterated with calcium carbonate and calcium sulfate. Vene- 

 tian red is ferric oxide, or a natural red oxide of iron. Calcium 

 carbonate is chalk or limestone, and calcium sulfate is plaster. 



IV. Venetian red in oil — 



Ferric oxide 12.82% 



Calcium sulfate 3.54% 



Barium sulfate 63.98% 



Oil and undetermined 19.66 % 



100.00% 

 Adulterated with barium sulfate and calcium sulfate. 



