r THEORY OF STATISTICS.
afford a good illustration of this form of distribution, but marred
by the unequal intervals so common in official returns.
TABLE XIV. —Showing the Frequencies of Different Numbers of Petals Sor
Three Series of Ranunculus bulbosus. (H. de Vries, Ber. disch. bot. Ges.,
Bd. xii., 1894, g.v. for details.) See Fig. 17.
Frequency.
Number _ _
of Petals.
Series A. Series B. Series C.
5 312 345 133
# 17 24 55
4 7 | 23
2 — 7
1 2 2 :
10 —~ - }
Li _
Total oor ong eng
The type is not very frequent in other classes of material, but
instances occur here and there. Table XIV, and fig. 17 show
Sa
3
io.
5 | | | Ho
S 0 Ey... of E, ] Fl  — . l -
SEGINT NSO SHGCRT 8 FiO SRC SNINID
F16. 17.—Frequency-distributions of Numbers of Petals for Three Series of
Ranunculus bulbosus: A 337, B 380, C 222 observations, (Table XIV.)
distributions of this form for the petals of the buttercup, Ranunculus
 bulbosus.
16. The U-shaped distribution, exhibiting a maximum frequency

202
an 2a