[36] Home Nature-Study Course, Vol. IV, No. 27, December, 1902.
[37] Quiz on Lesson No. 27, December, 1902.
[38] Teacher's Leaflet No. 1, December, 1896. The first Cornell nature-study leaflet. For a discussion of the title of this leaflet and what it signifies pedagogically, consult "The Integument Man," in "The Nature-Study Idea." (Doubleday, Page & Co.)
[39] Note.—Common ink will not answer for this purpose because it "runs" when the root is wet; indelible ink, used for marking linen or for drawing, should be used. It should also be said that the root of the common pumpkin and of the summer bush squashes is too fibrous and branchy for this test. It should be stated also that the root does not grow at its very tip, but chiefly in a narrow zone just back of the tip; but the determination of this point is rather too difficult for the beginner, and, moreover, it is foreign to the purpose of this tract.
[40] Teacher's Leaflet No. 12, January, 1899.
[41] Teacher's Leaflet, No. 12, January, 1899.
[42] Teachers' Leaflet No. 3, March, 1897.
[43] It is really impossible to tell whether the shoot started from the limb A in 1889 or 1890, without knowing the age of A; for the spur may have developed its blossom bud at the end in either the first or second year of its life. That is, young fruit-spurs sometimes make a blossom bud the very year they start, but they oftener "stand still" the second year and delay the blossom bud until that time.
[44] Nature-Study Quarterly No. 4, Leaflet 17, March, 1900.
[45] Teacher's Leaflet No. 13, February, 1899.