On the South African meteorites Mount Ayliff and Simondium, and the chemical composition of the meteorites Adare and Ensisheim (with Plate IV)1

page 165 note 1 Prior, G. T., Mineralogical Magazine, 1910, vol. 15, p. 812; 1918, vol. 18, p. 161.

page 165 note 1 Prior, G. T.; ibid., 1919, vol. 18, p. 849 .

page 166 note 1 An analysis of this iron is desirable, but mffortunately the amount available for investigation of this meteorite in any collection is small.

page 166 note 2 In a brecciated stone the rule would necessarily apply only to the individual fragments, e.g., in the recently described Cumberland Falls stone, to those of the dark chondrite on the one hand, and to those of the white aubrite on the other.

page 166 note 3 Prior, G. T., Mineralogical Magazine, 1916, vol. 18, pp. 26–86 .

page 167 note 1 Prior, G. T., Mineralogical Magazine, 1919, vol. 18, p. 353 .

page 168 note 1 By calculation to form FeS with the S.

page 168 note 2 These determinations were made on a separate portion of the total unattracted.

page 168 note 3 This somewhat high number, eQmbined with the high summation of the analysis~ suggests that possibly some at least of the water was absorbed during the interval of more than a year which elapsed between the preparation of the material and the determination of the water.

page 168 note 4 Apjohn, R., Journ. Chem. Soc., 1874, vol. 12, p. 104 .

page 170 note 1 By calculation to form FeS with th6 S.

page 170 note 2 These determinations were made on separate portions of the total unattracted.

page 170 note 3 F. Crook, Inaug.-Diss., Göttingen, 1868.

page 171 note 1 That such a relationship should be mathematically exact for slight differences in chemical composition is hardly to be claimed in view of our tgnoranee as to the mode of origin of chondritic stones.

page 172 note 1 See Merrill, G. P., Mere. Nat. Acad. Sci. Washington, 1919, vol. 14, Mere. 4, p. 9.

page 172 note 2 See Prior, G. T., Mineralogical Magazine, 1920, vol. 19, p. 56 .