5) Ore deposits from the Sierra de Aconquija (Capillitas Mines). 
Ore deposits in granite, crossed by dykes of rhyolite and andesite. 
The cassiterite occurs in connection with greisen 
Copper, gold, silver, lead, tin mines. 
A complet collection with all ocurring minerals, wallrocks, smelting 
products, slags, etc. Fine samples of silver-bearing tetraedrite , bornite,. 
enargite. cassiterite, gold-bearing pyrite and chal copy r i te , silver-bearing 
galena, rhodochros i te , linarite, cerussite, malachite, azurite, etc. 
68 samples from 18 mines and of size 18 x 15 cm. for $ oro 880 
54- » » 10 » » » » 11 X 14 >^> » » » 118 
44 » » 10 » » » » 10 X 18 » » » » 95 
94 » » 10 » » » » .7x9 » » » » 96 
78 » » 10 » » » » 7 X 9 » » >> » 78 
There is in preparation a large geologic investigation on the Sierra 
de Aconquija, which will soon be published in the: Anales del Ministerio de 
Agricultura de la Republica Argentina by Dr. J. Rassmuss. 
Furthermore Stelzner in his standard work ’’Beitraege zur Geologie und 
Palaeontologie der Argent in i schen Republik”, has published a very important 
report on the Capillitas Mines. 
Full information about the mines mentioned in 3, 4 and 5 will be found 
too in the: Boletin N. 13, Serie B, Geologia, del Ministerio de Agricultura 
de la Republica Argentina: ’’Rasgos geologicos generates de las Sierras Pam- 
peanas" by Dr. J. Rassmuss. 
6) Ore deposits of the Paramillo de Uspallata. Province of Mendoza. 
Sediments of Rhaetic age with sheets of olivine-diabase and correla- 
ted tuffs, crossed by dykes of andesites. 
Silver, lead, zinc and iron mines. 
The collection contains very beautiful samples of argentiferous gale- 
na, sphalerite, gold-bearing pyrite and chal copy r i te , siderite, etc., and 
all the country-rocks, diabase, melaphyre, tuffs, sandstones, bituminous 
slates with Estheria Forbesii Jones (Rhaetic), etc. 
43 samples from 80 mines and of size 18 x 15 up to 14 x 84 cm. for $ oro 180 
39 » » 30 » » » » 18 X 15 » » 14 x 18 » » » » 98 
33 » » 31 » » » » 10 X 18 » » 11 X 13 » » » » 70 
34 » » 13 » » » » 7x9 » » » » 30 
There are several publications on this subject, for instance: Anales 
del Ministerio de Agricultura de la Republica Argentina, Tomo 4, N.“ 3: "La 
Precordillera de San Juan y Mendoza", by. Dr. R. Stappenbeck. 
"El Paramillo de Uspallata", por el ingeniero de minas German Ave- 
Lallemant. Memoria presentada a la Sociedad Cientifica Argentina, 1890. 
7) A very fine a nd remarkable collection of Argent ine minerals , carefully 
selected specimens of decloizite (crystals and irregular), brackebuschi te 
(crystals), stiblite, coquimbite, copiapite, hohmanite, luzonite, famatinite, 
umangite, eucairite, vanadinite (crystals and irregular), chalcosine (in 
porphyry ), wollastoni te , diopside (crystals), Iceland double-ref rac ting spar , 
argentiferous tetraedrite, cerussite, linarite, malachite, azurite, chryso- 
Golla, brochantite, cassiterite, rhodochros i te ( crystals and irregular in 
form of veins and sheets), enargite (crystals and irregular), native silver, 
argentite, pyrargirite, proustite, embolite, argentiferous lead and sphale- 
rite, wolframite, cuprotungs t i te , cuproscheel i te , etc. 
95 spec, of size 7x9 cm. for $ oro 436 
87 » » » 7 X 9 » >> » » 388 
73 » » » 7 X 9 » » » x> 880 
80 » ^ 5 X 6 » » » >>894 
65 » » » 5 X 6 » » » « 800 
51 spec . of size 5x6 cm. for $ oro 130 
60 » >> 4 X 5 » » >' » 100 
58 » » » 4 X 5 » » » » 88 
45 » » » 4 X 5 » » » » 64 
80 » » » 3 X 4 » » » » 63 
