{891 — Observations on the genesis of certains 
magnetites. ( Abstract): — Proc..Amerc, Ass. Adv. 
Sci. 1890, XXX X, p. 263. Salem, 1891. 
1891 — Nepheline, bearing rocks in Brasil. 
( Abstract ): — Proc. Ame. Assoc. Adv. Sci. 1890. 
XXXIX p. 263. Salem, 1891. 
1891 — On the Separation and Study of the 
Heavy Accessories of Rocks. Proceedings of the 
Rochester Academy of Science pp. 198-206, vol. 
I, Rochester, N. Y., 1891. 
1891 — Apatite no minerio de ferro de Ipane- 
ma, Revista de Engenharia, n. 271, 14 de De- 
zembro de 1891, XII, p. 634. (Do Diario Official 
de S. Paulo, 1891), Rio de Janeiro, 1891. 
1891 — On the occurrence of Xenotime as an 
accessory element in rocks. American Jour. or 
Science. XXI, pp. 308-311, New Havem, 1891. 
1891 — Magnetite ore districts of Jacupiranga 
and Ipanema, S. Paulo, Brasil, Amer. Jour, Scz., 
vol. XLI, pp. 311—321, For erratum v. p. 522, 
New Haven, 1891, Tambem no: Neues Jahrbuch 
für Mineralogie, 1894, I. p. 90. 
1—A ilha de Marajó, vol. II, n. 2, pp. 163- 
173. 
IV — Reconhecimento do rio Maecurt, vol Jl, 
n. 2, pp. 163-173. 
VI— A Serra de Maxirá, vol. Il, n. 3, pp. 
340-243. 
VII — À Serra de Tajuri, vol. ll, n. 3, pp. 
544-351. 
X — O rio Trombetas, vol. Il, n. 3, pp. 266-382. 
1892 — Is the S. Francisco do Sul ( Santa Ca- 
tharina ) iron, a meteorite ? Science, XX, pp. 254- 
255. Nova Yorck, 1892. 
1893 — A study in consanguinity of eruptive 
rocks, Journal of Geology, Voil 1, n. 6, pp, 997- 
605. Chicago, 1893. 
1893 — Humboldt and Brasil, Science, XX II, 
1893, p. 91. Nova York, 1893. 
1893 — ( With F. W. Dafer) — On the Sepa- 
ration of Minerals of High Specific Gravity Pro- 
