Table 7. Human bone samples tested for determination of fluorine concentration.

Ind.	Average age	Skeletal element	Na-corrected μ F (ppm)			corrected F values	± E.S.V.I. 95%
11∶15	0 (7 iu-m)	Rib	18400	±	1275	/	/
10∶41	0.5–1.5	Ilium	16600	±	540	/	/
12∶12	2.5–3.5	Ilium	16900	±	450	/	/
12∶18	3–4	Ilium	15200	±	793	/	/
12∶17	5–6	Ilium	16500	±	476	/	/
12∶6	8–9	Ilium	16100	±	1803	/	/
12∶25	9–11	Ilium	14900	±	1340	/	/
12∶14	11–13	Ilium	14000	±	1267	2042	3392
5∶1	13–16	Ilium	14400	±	372	2442	3328
12∶20	16–20	Ilium	16000	±	624	4042	3249
12∶9	23–28	Rib	16300	±	467	4342	3138
12∶4	24–30	Rib	17200	±	381	5242	3118
10∶29	26–32	Rib	16350	±	166	4392	3103
10∶19	27–33	Rib	18900	±	435	6942	3098
12∶26	28–34	Ilium	17300	±	597	5342	3094
10∶13	31–37	Ilium	19000	±	495	7042	3090
10∶12	31–37	Ilium	19250	±	311	7292	3090
12∶28	32–39	Ilium	19300	±	271	7342	3095
12∶27	32–39	Ilium	20800	±	197	8842	3095
10∶14	34–40	Ilium	18200	±	398	6242	3099
10∶21	34.5–40.5	Ilium	19200	±	213	7242	3102
10∶18	35–41	Rib	19850	±	221	7892	3105
10∶1	36–42	Ilium	22100	±	363	10142	3113
12∶23	38–46	Ilium	19900	±	620	7942	3142
10∶20	40–48	Ilium	23050	±	508	11092	3169
10∶3	45–55	Rib	23300	±	95	11342	3279
12∶11	47–57	Ilium	18200	±	196	6242	3325

Ind. = specimen; iu-m = intra-uterine months; E.S.V.I. = interval for expected single value.