New York AGRICULTURAL EXPERIMENT STATION. 155 
The free space between the rows will also vers with the age of 
the bed. 
The mixture should strike the plant from all directions at the 
same time without having the jets of spray conflict. Theoretic- 
ally with a machine which would stop an instant at each plant, 
this could be done by the employment of five nozzles to a row, 
but in a moving machine the resultant direction of the jets of 
spray requires the use of ten nozzles for efficient service. Later 
it was found necessary to use twelve nozzles to a row, especially 
on full grown, vigorous beds. 
In addition to being adjustable it was peaiadle to be able to 
elevate the nozzles from between the rows when turning around 
at the end. It was found that thrifty plants, in rows six feet 
apart, nearly covered the ground, hence it was essential to devise 
a means for lifting the asparagus before the spray reached it. 
This was necessary, not only in order to do the work thoroughly, 
but also to prevent tearing the nozzles from their carriers. 
With all these conditions to be met the machine described and 
illustrated in the following pages was designed and built. As 
spraying may prove to be an aid to many growers in preventing 
the asparagus rust, the following detailed description of the 
machine and its parts is given, with notes upon some of the weak 
points and suggestions for remedying them. The machine is not 
patented and it is hoped that growers may make use of the ideas 
and suggestions in the construction of machines of less cost, thus 
lowering the expense of spraying. 
DESCRIPTION. 
THH TRUCK. 
Several conditions had to be met in constructing a truck. The 
height required to clear the asparagus is one factor. At first it 
was thought that this could be disregarded by constructing a 
narrow-tread machine which would go between the rows, but 
such a machine would be difficult to get through the rows of full 
grown asparagus, and could carry only a small weight of liquid. 
These considerations led to the abandonment of this scheme. The 
desirability of carrying a large amount of liquid, and the neces- 
