THATCHING ON THE FARM 



329 



PRINCIPALS AND COMMON 

 RA FTERS A L TERN A TE AT 

 8' INTERVALS, THUS AD- 

 JACENT RAFTERS ARE 4' 

 APART. 



Fig. 240. — Forage Sheds in Rough Timber. 



Protection from Lightning. — The protection from lightning of a building 

 with a thatched roof is made clear by Fig. 241. The object in view is the 

 enclosure of the building in a kind of metal "cage," and for this purpose 

 stout barbed wire may be used, connected to the galvanised iron roof-capping 

 and carried down into the ground, where each wire is joined to a paraffin tin 



'BARBED 



Fig. 241. 



buried in the earth. This provides the lightning with a path to earth. The 

 paraffin tins are set open end up, and, by retaining water, form an excellent 

 " earth." Another form of simple " earlh " consists of a tangle of wire buried 

 a few feet in the ground ; dampness of the latter improves the " earth." 



All projections above the roof should be protected. Note the barbed wire 



