264 Method of constructing 



inches above the ground ; upon this brickwork the planks 

 are placed, and bolted together. Two boards, like that 

 shown at G, are placed between the planks at the ends, to 

 form the ends of the mould; these boards are placed between 

 the two bolts a a, which are seen close together at the end 

 of the moulds, and are held fast by that means; the earth 

 is now to be rammed in between the moulds by the rammer 

 with an iron head X. When the mould is filled with earth 

 and well rammed down, the keys are to he taken out of the 

 bolts, and the bolts drawn out ; the planks are then removed, 

 and put together again, a length further upon the wall, the 

 bolts at the end being put through the holes left in the wall, 

 only one of the end boards is now put in, and the ramming 

 proceeds as before : in this manner straight walls may be 

 built of any length; and when the lower course is finished, 

 then the mould may be taken to pieces, and put together 

 again upon that course, the lower bolts of the frame being 

 put through the bolt holes which the upper bolts made in 

 the wall at the first operation, to insure that the upper part 

 of the wall is in the same place, and exactly over the lower. 

 When a wall is to be built thinner than usual, a block of 

 wood must be placed under the head of each bolt, so as to 

 diminish the space between the planks. 



When the angle walls of buildings are to be made, the 

 apparatus is put together, as shown in the plate; four of the 

 planks are put together to form a right-angled mould, one 

 end of each of the planks F and H is furnished with double 

 bolts, the other ends have'each twoeyebolts fixed into them, 

 as shown separately at bd; then a bolt n connects the two 

 moulds, so as to form a hinge ; the planks are kept together, 

 so as to be perpendicular to each other, by a long iron rod 

 K, hooked into eyeboits fixed in the planks. The outside 

 planks of the mould are joined together in a different man- 

 ner, see fig. 5, that of one frame being longer -than that of 

 the other, and has two pair of holes through its end O, to 

 receive the bolts / /,' which are fastened to the ends of the 

 other shorter plank, and the keys are put through the ends 

 of the bolts, to secure the planks together; a piece of wood 

 P is occasionally placed between the end of the short plank 

 and the side of the other, to increase the space between the 

 planks, to make a thicker wall, the two bolts at the end of 

 the plank being received into the notches in the piece of 

 wood, and these bolts are then put through the holes ZZ 

 of the lon<r plank. Jn building the angle wall, it is neces- 

 sary that the vertical joint formed between each mould 

 ehould not be over one another, but arranged in the same 



manner 



