prey The Principles of Frait-growing. — 
show color. In the spring of 1897, some observa- 
tions were made upon this point at Cornell. Buds 
of apricots, peaches, plums and pears (as shown in 
Fig. 53) had swollen to three or four times their 
normal size. The pink color of the apricot buds was 
distinetly visible, and the tips of the anthers could 
be seen in the Japan plums by looking down squarely 
upon the buds. In this condition, the buds endured 
with no injury the following temperatures, as taken 
by self-registering thermometers hung in the _ trees 
(very light snow on the ground and a wind blowing 
all night): 
Lowest temperature. 
April 20, Apricot, peach, Japan plum, pear ............. 18° 
April 21, Apricet, PEG, POAT 4s vesdsvaveviesea casei cess 19° 
PAPAM WWM. accesses ys wvtrson aii eesenmeteaion wliies. 4 18° 
It will be seen that these buds endured 14 degrees 
of frost without injury. Upon the coldest morning, 
the buds were stiff from freezing, and in some in- 
stanees the backs and tips of some of the petals were 
permanently discolored. The buds swelled with the 
freezing, but returned to their previous size when 
thawed out, but they looked as if withered for several 
days,—or until active expansion began. It is very 
probable that buds cannot endure this degree of cold 
further south. 
Injuries to flowers and growing parts.—When_ the 
flowers have fully expanded, a comparatively light 
frost will destroy them. This is shown in the fact 
that. a very slight elevation in a blackberry or straw- 
