PRACTICAL HINTS TO NURSERYMEN Iig 
multiply by 0.25 (twenty-five hundredths) and divide 
by 28.35, as indicated above, and you will obtain the 
correct amount in ounces. Always bear in mind that 
fumigation will admit of no guesswork, as success 
depends on accuracy. 
Low-grade stock, as indicated in Chapter III., should 
not be fumigated with the 0.25 gramme formula. The 
0.16 or 0.18 formula should be used for June budded 
peach or plum, low grade peach and plum, known 
as whips, and for scions, buds, grafts, ete. In using 
this formula, the cubic contents of an enclosure should 
be multiplied by 0.16 or 0.18, as the case may be, and 
reduced as above to ounces. 
Cost of nursery stock fumigation.—It is difficult to 
ascertain the exact cost for fumigating young trees 
per thousand. The conditions under which the trees 
are grown and handled in most States varies consider- 
ably. In most cases, nurserymen who have had much 
experience along this line have found that the ordi- 
nary first-class grade of fruit trees can be fumigated at 
a cost not to exceed twenty-five cents per thousand 
trees. This amount includes the chemicals and extra 
labor in handling. However, the cost of the fumiga- 
ting house or box is not taken into consideration. In 
many cases where a room can be filled with trees the 
cost of fumigation can be reduced from ten to fifteen 
cents per thousand trees, depending upon the grade 
and kind. It is often necessary to fumigate a small 
bundle of trees in a large room or enclosure. In such 
a case, the quantity of chemicals necessary-to fill the 
