(_b_) The waxed rim cell, or cell No. 2, evaporated 26 ounces of
water and the creeping of zinc sulphate salts was not prevented
by the waxed rim. The wax proved of no value.

(_c_) The wax sealed cell, or cell No. 3, showed practically no
evaporation and only very slight creeping of zinc sulphate salts.
The creeping of salts that took place was only around spots where
the edges of the seal were loose from the jar.

(_d_) The paraffin oil sealed cell, or cell No. 4, showed no
evaporation and no creeping of salts.

It was concluded by Mr. Reid from the above experiments that the wax
applied to the rim of the jar is totally ineffective and has no
merits. The wax seal loosens around the edges and does not totally
prevent creeping of the zinc sulphate salts, although nearly so. The
wax-sealed jar must have holes drilled in it to allow the gases to
escape. The method is hardly commercial, as it is difficult to make a
neat appearing cell, besides making it almost impossible to manipulate
its contents. A coat of paraffin oil approximately 1/2 inch in
thickness (about 6 ounces) gives perfect protection against
evaporation and creeping of the zinc sulphate salts. The cell, having
the paraffin-oil seal, had a very neat, clean appearance as compared
with cells No. 1 and No. 2. It was found that the zinc could be drawn
out through the oil, cleaned, and replaced with no appreciable effect
on voltage or current.

Setting Up:--In setting up the battery the copper electrode is first
unfolded to form a cross and placed in the bottom of the jar. Enough