causing distortion. W. G. Bixby
states (Ref. 3) that a birdseye maple tree 170 years old was only about
a quarter as large in diameter as normal trees of the same age. I know
of no comparison of curly walnut with other types of walnut. The
original Lamb walnut tree was apparently a very large one.

In conclusion, it is obvious that our knowledge of the possibility of
producing curly grained walnut logs by grafting is as yet incomplete.
Much more information is needed and at the present time undoubtedly much
can be gained by examining the Lamb walnut trees, which are growing in
various parts of the country. This can be done without seriously
injuring the trees as described earlier in this paper. Those in the
Northern Nut Grower's Association, who have Lamb trees are urged to
examine them to find out if we can gain further useful information
regarding this rather important subject. Obviously, if it is possible to
grow curly walnut through vegetative propagation, we should know under
what conditions a grower can expect to successfully produce a curly
grained log.

References

1. MacDaniels, L. H. The apple tree crotch, histological studies and
practical considerations. Cornell Univ. Agr. Exp. Sta. Bul. 419:
1-22. 1923.

2. ---- and Otis F. Curtis. The effect of spiral ringing on solute
translocation on the structure of the regenerated tissue of the
apple. Cornell Univ. Agr. Exp. Sta. Memoir 133:1-32. 1930.

3. Bixby, W. G. Field work at Warren, New Hampshire. Unpublished
Report. 1932. (On file with U. S. Forest Products Laboratory,
Madison, Wisconsin.)

4. Heinkinheimo, O. Om odling ar masurbjork (The cultivation of
figured birch). Skogen 27:165-167. 1940. (Translation in U. S.
Forest Products Laboratory.)

5. Heinicke, A. J. Influence of scion leaves on the quality of apples
borne by the stock. Am. Soc. Hort. Sci. Proc. 24:143-146. 1927.

6. Swarbrick, Thomas and R. H. Roberts. The relation of scion variety
to character of root growth in apple trees. Wisconsin Univ. Agr.
Exp. Sta. Res. Bul. 78:1-24. 1927.

7. Wilkinson, J. F. The grafted curly walnut as a timber tree. Northern
Nut Growers Ass'n. Proc. 39:139-142. 1948.

8. Pillow, M. Y. Dormant buds are not the cause of bird's eyes in
maple. Wood Working Industries 5:26-27. Sept. 1929.

9. Grober, Samuel. Science shows the way. Chemurgic Di