338 REPORT—1850. 
Registration of the Periodical Phenomena of Plants and Animals. 
Tue following tables are the first fruits of the labours of the Committee ap- 
pointed by the Association for the purpose of preparing tables and obtaining 
results on the periodical phenomena of plants and animals. 
The Committee could have wished that a larger number of the tables 
which they have circulated had been returned, and they hope the publica- 
tion of the following papers will induce others to. forward to them the result 
of their observations. 
On account of the deficiencies under many of the heads, it has been 
thought advisable to omit some of the columns which are given in the cir- 
culated tables. Where, however, any of the omitted columns contained in- 
formation of importance, it has been added in the form of “ remarks,” as in 
pages 348, 349. 
For the convenience of reference, the Committee have thought it better to 
republish the list of plants and animals with the numbers attached. They 
have allowed observations on other plants and animals to be printed at length 
in the columns, although the confining the observations to the published list 
spares much space in the printing. They wonld call the attention of obser- 
vers to the importance of making observations on the same plants and ani- 
mals for the purposes of comparison. Two observations on the same plant _ 
or animal in different years are of more value than a large series of single 
observations in attaining the objects of this registration. 
The Committee request that observers wishing for a fresh supply of tables 
will apply to Professor Phillips, York, and that they will inclose to him any 
observations they may have made at least a week before the Annual Meeting 
of the Association, in order that they may be laid before the Section of the 
Association in which the Committee has originated. 
For general directions for observing, the Committee must refer to their 
Report, published at page 321 of the volume of the Transactions for 1845. 
LIST OF PLANTS AND ANIMALS, 
WITH THE NUMBERS REFERRED TO IN THE FOLLOWING TABLES. 
LIST OF VEGETABLE KINGDOM. , 
List of Plants to be observed for the periods of Foliation and Defoliation. 
1. Acer campestre, L. 15. Bignonia catalpa, L. 30. Crateegus oxyacantha, Z. 
2; psendo-platanus, Z. 16. radicans, £. 31. Cytisus laburnum, Z. 
3. —— saccharinum, ZL. 17. Carpinus americana, Mich. 32. sessilifolius, Z. 
4. tataricum, L. 18. —— betulus, L. 33. Euonymus europzus, ZL. 
5. Aisculus hippocastanum, Z. 19. orientalis, Z. 34, —— latifolius, M777. 
6. lutea, Pers. 20. —— Celtis cordata, Desf. 35. verrucosus, Scop. 
7. —— pavia, L. Ὡς orientalis, Z. 36. Fagus castanea, L. 
8. —— macrostachys, Mich. 22. Cercis siliquastrum, L. 37. sylvatica, L. 
9. Amygdalus communis, Z. 429. Chionanthus virginica, Z. 38. Fraxinus excelsior, Z. 
10. —— persica, L. (β. Made- 24. Corchorus japonicus, L. 39. juglandifolia, Lam. 
leine). 25. Corylus avellana, L. 40. ornus, LZ. 
11. Aristolochia sipho, ἢ. 26. colurna, L. 41. Ginkgo biloba. 
12. Betula alba, Z. 27: tubulosa, Willd. 42. Gleditschia inermis, LZ. 
13. alnus, ὦ). 28. Cratzgus coccinea, L. 43. —— horrida, Wild. 
14. Berberis vulgaris, Z. 29. monogyna, Jacg. 44, —— triacanthos, L. 
