176 Scientific Proceedings, Royal Dublin Society. 
identical, carefully-made, copper ‘‘ evaporating gauges,’ with 
turned brass rims, in a large, louvered screen—one insulated, 
one connected to earth, one joined by an insulated wire to 
a (poor) collector suspended at a height of 45 feet ; the fourth 
joined in the same way, but also earthed as well. The gauges 
were interchanged frequently, so as to eliminate their personal 
equations if such should exist. In the result, one gauge evaporated 
pretty much the same as another; when differences did show in 
the quantities evaporated, they were so small as to be most easily 
ascribed to errors of observation. This result applies only to the 
question whether an insulated gauge loses more or less than an 
uninsulated one ; it does not touch the question whether electrified 
water evaporates faster or slower than unelectrified. 
