THE MACADAM IA NUT IX HAWAII 
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about an inch in length was added to aid in giving more cambium 
surface where growth united the stock and the scion and to hold the 
union firmly where it was bound with raffia. This is of vital im- 
portance to the success of a graft. The whole outer surface of the 
Figure 6. — Side-tongue method of grafting the Macadamia : A, Variation of scions : 
B, cuts made in scion and stock; C, scion in place; D, union tied firmly and 
ready to receive a coating of liquid paraffin 
union, including the tying material, was also protected from outside 
contamination by a coating of lukewarm liquid paraffin applied Avith 
a brush. 
Paraffin fills every crack and rapidly hardens into a clean, water- 
proof, air-tight coat which not only protects the graft, but also 
