284 



AXXUAL rvi;P()RTS OF DEPARTMENT OF AGRICULTURE. 



Fun<;i('ide Board, the Buioaii of Entomoloi^y, and the Bureau of 

 Plant Indn.strv. More tlian 200 samjiles of water were examined 

 for the Bureau of Pul)lic Roads, in connection with an investigation 

 of the causes of deterioration of cement tile. The failure of cement 

 tile to withstand the action of the soil and drainage waters is espe- 

 cially marked in southwestern Minnesota. 



Table 5. — Samples analyzed for other departments. 



