PLATE 5 
A. —Tile from' Grand Rapids Experimental Farm. Laid 1910. Taken up 1918. 
Laid in pile until 1921. 
B. —Same as Plate 5, A, showing tile disintegrated on inside at bottom. 
C. —Similar to preceding, showing disintegration at water line. 
D. —Grand Rapids station, showing sample No. 2 in the ground with the peat arched 
above it. 
