fio July, 1911-] 



Silo Construction. 



501 



Fix a peg in the centre of site and describe a circle witli a trammel 

 7 ft. 9^ in. long. Sink posts 3 ft. in the ground .so that the inside face 

 of each post is true to the end of trammel. Keep the top of posts to one 

 level and faces truly perpendicular. Well ram the earth put back. From 

 'the centre line of face of post to the centre line of next post is 5 ft. \\\ in. 



? Double Hoop 



'-7~-t Ti -i t- tm -rr r n 1 1< 1 1 1 1 ii Ja-»«-~-» .-»i-« 



70 TON ALL-WOOD SILO — DETAILS AND GENERAL DRAWINGS. 



Treble Hooi'S.- \ail three 4-in. x \-\\\. l)oards to the inside of posts, 

 ^carefully springing the first of them to the circle descrilxxl by trammel 

 which has been reduced in Irngth to 7 ft. 9 in. Keep the l>ottom edge 

 •of the first treble h(K)p 9 in. from the ground, c.irr Inking taken to l>reak 

 the joints. A similar treble h<K)]i is then fixed so that its upper edge is 

 3 in. below the toj) of each [xtst. In fixing tlie upper trel)le hoop, the 



