222 LIGHTNING CONDUCTORS. 



a. Use as many points as possible (paragraph 9) — 

 three short points placed ten feet apart on a roof ridge 

 are much better than one elaborate and expensive three- 

 pointed terminal. 



b. Use galvanised wire of smalt section and intercon- 

 nect all points on the roof. The lighter the gauge of 

 wire used the greater the area of roof covered for the 

 same outlay, (paragraph 7). 



c. Avoid sharp bends and turns in the wire. Side 

 flashes are apt to jump off from an abrupt bend or kink, 

 which may cause damage to the adjacent masonry. 



d. Connect in the roof gutters. Actual jointing is 

 unnecessary and it will usually be found convenient to 

 have the wire from corner points laid along the gutter- 

 ing and thence through down pipes to earth. 



e. Take the earth connection away to a deep " earth" 

 even if it is necessary to go a considerable distance from 

 the building, The additional area of "surface" earth is 

 useful, and the cost of wire and extra trenching is small. 



/. Avoid joints as much as possible. Joints between 

 the ordinary points and the wire forming the conductor 

 are frequently made disgracefully, and, in numerous 

 instances, the writer has found an actual break in con- 

 tinuity. The difficulty of supervising explains this — in 

 fact the work is often left entirely to native workmen 

 — and the remedy which suggests itself is that of 

 adopting some practically jointiess system. 



Penang, September 10th, 1901±. 



