These photographs picture an actual test made on 
"Rex Begonias.’ Both plants were selected Novem¬ 
ber 1, 1939 from uniform stock. Both were as nearly 
alike in size, appearance and other characteristics as 
S ossible. Both were then grown under identical con- 
itions in a lath house. 
The plant at the left was given weekly waterings 
of Vitamin Bi. The one below received no Vitamin 
Bi. See what a difference Vitamin Bi makes! 
Received no 
Vitamin B t 
Plants—like human beings — need this 
essential vitamin. Of all the plants tested, 
it has been found that not more than 2% 
produce enough Bi for their needs. Zoom 
supplies this lack—by supplying Vitamin Bj 
in its original, tested, concentrated form. 
When you get daffodils that can hide a 
salad plate . . . gloxinias and begonias bigger 
than any you ever hoped to see . . . snap¬ 
dragons taller than a man—you’re going to 
be the talk of the neighborhood! That’s why 
you’ll want to be among the first to use Zoom 
Bi for your plants and flowers. 
