To graft two plants together using the tongue or whip grafting approach, you must first make a sloping cut in the rootstock with a ‘tongue’ pointing up. Next you must make a matching cut in the scion wood with a ‘tongue’ pointing downwards. Finally you join the two, ensuring maximum contact of the cambium layers. Bind with rafia or polythene tape and seal with grafting wax.
Yearbook of the United States Department of Agriculture (Washington: Government Printing Office, 1903) 251