Nipher — Gravitational Repulsion. 



185 



large masses and screen. A sketch of this arrangement 

 is shown in Fig. 3. The sheets of metal which carried 

 these pins were punched with small holes, through which 



the pins were inserted and the heads were then soldered 

 to the sheets of metal, which were then hung upon the 

 insulated rods by metal hooks. At one end this line of 

 rods terminated in a disc of metal upon which 150 pins 

 were mounted. Facing this disc was a duplicate, the 

 points of the pins in the two discs being three or four 

 inches apart. This last named disc was directly con- 

 nected with one terminal of an influence machine in an 

 adjoining room, the other terminal being grounded on a 

 water pipe. There were no condensers attached to the 

 machine, and the knobs were widely separated. There 

 were no gaps in the line of conductors. The machine was 



