Foundation drains show proiniGe of satisfactory operation, particularly 

 vjhen pressures arc not excessive. 



Vertical joint leakage froin concrete stave silos r.ir.y be controlled to 

 some extent by prestressing the hoops. Joints must be redesigned or pro-'/ided 

 with seals before general satisfaction can bo expected. 



Results of the New Jersey tests on coatings for concrete are not at 

 all promising. However, other observations scorn to indicate that varnislies 

 and synthetic resin v;ith wood oil vehicles, asphalts, coal tars, and Portland 

 cement v/ashes show promise of giving some satisfaction. In choosing an 

 asphalt or coal tar preparation, care should be taken tc select one thrt has 

 a high melting point in :)rder to minimize sticking of the silage, Soine sug- 

 gestions regarding silo coating are given in Bulletin CP 14 of the Portland 

 Cement Association, 



Silos should be adequately reinf •"•reed. Tables 8 and 9 in U,S,D,A, 

 Farmers' Bulletin 1820, give reinf Trcin.':r; schedules thr.t are r.dcquate. 



Silos with exposed reinforcing arc likely to be more satisfactory for 

 storing high moisture silage since such reinforcing c,".n be prestresscd, or 

 drawn sufficiently tight when the silo is erected to overcome the effect of 

 tlie silage pressures, thereby lessoning the tendency for cracks to open in 

 the vralls. It can ;\lso be inspected at vn.ll and r(.'pr.irs or replacements 

 easily made vv'hcn necessary. 



Under usual farm conditions the average size silos will hold about 

 the same tonnage of grass as corn. 



