508 
If vinegar keeps dull after it is made and shows signs of 
malady, which destroy the inherent acetic acid and the bouquet, pas- 
teurising will remove the trouble. The apparatus should be well 
tinned to guard against corrosion. 
INFERTILE GRAPE VINES. 
When the vines have set their fruit, any that are sterile or 
fail to carry a crop commensur- 
ate with their vigour more forci- 
bly attract attention. 
By setting of the fruit is un- 
derstood the proper fertilisation 
of the ovary. This occurs in the 
spring of the year, and wherever 
grape vines are grown under ar- 
tificial conditions of shelter, ete., 
it proves an anxious time to all 
cultivators of the vine. 
In Western Australia, where the 
open air climatic conditions in 
the spring are in every respect 
favourable to the proper fertili- 
sation of the ovaries, grapes set 
without trouble and with great 
perfection. Yet individual ex- 
ceptions are occasionally met with, 
which are subject to the following 
conditions :— 
g I. Climatic conditions which 
Fie, ee grapes st noaeeInE. . 
showing complete non- II. Structural or constitutional 
setting. defects. 
In the first instance it is important to understand how the 
grape vine blossoms set. 
Fia, 2.—Normal buds Fia. 3.—Normal flowers 
before fertilisation. after fertilisation. 
