CRANBERRY CULTURE. 453 
soil about half saturated is most favorable to their growth and 
therefore favorable to the growth of the whole plant. 
(5) That growth is dependent on the turgidity of the cells, and tur- 
gidity is dependent on the absorption of water by the roots. 
(6) That the water absorbed by roots is continually being lost by 
evaporation from the leaves. If the loss is equal to or greater than 
the absorption, the plants will cease growing, and unless the ab- 
sorption is increased or the evaporation decreased the plants will 
die. 
(7) That evaporation may be controlled by increasing the amount 
of moisture in the air, by protection from hot winds, and by the use 
of certain substances in the soil or on the leaves to enable the plant 
to hold on to the water that it has. 
Finally, then, an accurate knowledge ofthe relatiou of water tothe 
growth of plants will enable us to control more fully the develop- 
ment of the plant as a whole, and also the relative growth of its 
parts. It will show us how to modify the growth of the plants, that 
they may be able most successfully to withstand adverse conditions 
and produce the most valuable substance for a given amount of 
labor. 
CRANBERRY CULTURE. 
(Prepared for the ‘‘ Northwest Horticulturist,’ Tacoma, Wash., by James Web- 
ber.) 
HOW TO SELECT A BOG. 
The bog should be in a location well protected from frost, with a 
bottom of peat, mud or moss, or it may be of the substance known 
in this section as muck-soil, Cranberries will grow well on either 
foundation. There should be sufficient inclination to the bog to af- 
ford fall enough to allow the water to be drained off to eighteen 
inches below the surface. If there is not a brook running through 
the bog, there should be a spring ora pond above it, capable of af- 
fording a sufficient supply of water to flow it readily. If thereis 
water enough to cover the vines completely, it is all that is needed. 
The bog, after it is three years old, ought to be flowed (or kept moist) 
from the first of November until the first of June, as it is then thor- 
oughly vined, and a crop may be expected. There should bea suf- 
ficient supply of coarse sand suitable for covering it, near the bog. 
A huckleberry, maple or cedar swamp is preferable to the fresh 
meadow, for the reason that it costs less to take care of it after plant- 
ing. Trees should not be allowed to grow near enough to the 
bog to shade it, because it will result in producing rank vines and 
but little fruit. 
Notwithstanding the fact that most successful bogs, as a rule, are 
those located where they can be readily flowed and thus protected 
from the ravages of insects and injury by frost, yet there are some 
notable exceptions to the rule. There are dry bogs under cultiva- 
tion in one of the Eastern states comprising hundreds of acres that 
have produced well for years, escaping both frost and the fire worm. 
