A. B. IlHut—Tlic A<je of the Earth. 120. 



1873. J. Adams. Geol. Mag., Vol. X, n. 198, etc. 



1873. T. 0. Ward. Geol. Mag., Vol. X, p. 425. 



1874. Joseph Stevens. Twenty-tirst Auuual Report, Brighton and Sussex Nat. 



Hist. Soc., p. 14, etc. (read October 9th, 1874). 

 1874. R. F[alkner]. Geol. Mag., Dec. II, Vol. I, p. 96. 



1874. Bryan King. (Stukeley's notes.) Wilts Mag., vol. xiv, p. 230. 



1875. Joseph Stevens. Jonrn. Proc. Winchester' and Hampshire Scient. Lit. 



Soc, vol. i, pt. 4, p. 224, etc. (read March 9th, 1874). 

 1875. Joseph Stevens. Report of the Marlborough College Nat. Hist. Soc. 



1875. T. Rupert Jones. Geol. Mag., Dec. II, Vol. II, p. 588. 



1876. T. Rupert Jones. Ibid., Vol. Ill, p. 523. 



1876. N. Story Maskelvne. Wilts Archajol. and Nat. Hist. Soc. Mao-., v„i. ^vii 



p. 149. 

 1876. E. T. Stevens. Jottings on Stonehcuge, etc. (i)rivatclv printed). 



pp. 128, 205, etc. ^ i - i /. 



1876. W. Long (([uoting Symonds, 1G44). Wilts Mag., vol. xvi, p. 68, etc. 

 1876. H. B. Woodward. Geologv ot England and Wales, pp. 252, 363 ; 



2nd ed. (1887), p. 449. 

 1878. A. C. Ramsay. Phys. Geol. Geogr. Gt. Brit., 5th ed., p. 350. 

 1878. T. Rupert Jones, trans. Newbury Dist. Field Club, vol. ii, p. 248. 



1880. A. Irving. Nat. Hist. Sandhurst, pp. 80, 87. 



1881. J. A. Phillips. Quart. Journ. Geol. Soc, vol. xxsvii, p. 18. 



1881. T. Rupert Jones. Proc. Geol. Assoc, vol. vi, pp. 330, 436-7. 



1882. A. Geikie. Textbook of Geologv, p. 342 ; 2nd ed. (1885), p. 329. 



1883. W. H. Hudleston. Proc Geol." Assoc, v(d. vii, p. 138. 



1884. A. C. Smitli. Guide to the Antiquities of North Wilts, pp. 27, 28, 127-9, 



134, 150, 211. 



1885. W. Carruthers. Geol. Mag., Dec. Ill, Vol. II, p. 361, etc. 



1884. A. Irving. Report Brit. Assoc. Meeting in 1883, p. 505. 



1885. A. Irving. Proc. Geol. Assoc, vol. viii, pp. 156-160. 



1885. W. Whitaker. Geology of the Country around Ipswich, Hadleigli, and 



Felixstowe, pp. 9, 15, 16, 94, etc. Mem. Geol. Surv. 



1886. T. Rupert Jones. Historv of the Sarsens. Wilts Arclneol. and Nat. Hist. 



Soc. Mag., No. 68, December, 1886, vol. xxiii, pp. 122-154. 

 1887- A. Irving. Quart. Journ. Geol. Soc, voL xliii, p. 380. 



1887. W. Whitaker. Proc. Geol. Assoc, vol. ix. p. 53(i. 



1888. T. G. B(mney. Geol. Mag., Dec III, Vol. V, p. UW. 



1891. H. B. Woodward. Geol. Mag., Dec. Ill, Vol. VIII, pp. 101-121. 

 1894. J. Prestwich's Collection. Conglomerate and Flint ]5rcccia from Marl- 

 borough. 



1896. W. V,''hitaker. Proc. GeoL Assoc, vol. xiv, p. 175. 



1897. Percy Richards. Quart. Journ. Geol. Soc, vol. liii, pp. 421, 426. 



1897. A. Irving. Proc. Geol. Assoc, vol. xv, p. 196. 



1898. A. Irving. Proc. Geol. Assoc, vol. xv, p. 236. 



1898. A. E. Salter. Quart. .lourn. Geol. Soc, vol. liv, p. 194. 



1898. H. W. Monckton. Quart. Journ. Geol. Soc, vol. liv, pp. 185-193. 



1898. W. Whitaker. Quart. Journ. Geol. Soc, vol. liv, j). 193. 



1898. W. H. Shrubsole. Quart. Jom-n. Geol. Soc, vol. liv, p. 194. 



1900. H. W. Monckton. Proc Crovdon ^Micros, and Nat. Hist. Club, p. xv. 



1900. T. E. Lones. Trans. Herts Nat. Hist. Soc, vol. x, pp. 160, 162. 



1900. II. B. Woodward. Geol. Mao., Dec IV, Vol. VII, p. 543. 



1901. J. W. Judd. Geol. Mag., Dec IV, Vol. VIII, p. 1. 



VI. — The Age of the Earth and the Sodium of the Sea.' 

 By Arthuk R. Hunt, M.A., F.G.S. 



PROFESSOR J. JOLY, iu his interesting paper estimating the 

 geological age of the earth from the amount of sodium 

 contained in the sea,' mentions in an appendi.K seven possible errors 

 which may render his estimate a minimum, and seven others which 

 may render it a maximum. Neither among the former errors 

 ' Trans. Rov. Dublin Soc, vol. vii (1399), p. 23. 



