EUGEN HUSSAK 149 
1893 under the title of The Determination of Rock-forming Minerals. 
He was then called to Germany as assistant to Professor D. 
Laspeyres and in that capacity worked at Kiel and later at Bonn. 
He remained in Germany until 1887, publishing in the meantime 
his Katechismus der Mineralogie, a book which has passed through 
five editions. 
In the universities and museums of Germany and Austria 
Hussak had examined various collections of Brazilian rocks and 
minerals that had been put aside to await classification. At 
Vienna he saw the collections made by Helmreichen, in Bonn he 
saw those made by Krantz, and at Berlin he saw a collection from 
Rio Grande do Sul. In all these collections he saw much inter- 
esting material, and Brazil seemed to him a new land of promise. 
But Hussak was not a man who cared to work over the ground or 
materials left by others, and he took no pleasure in finding fault 
with the work of others. He preferred new fields. Brazil offered 
such an opening and whether and when he would go there was only 
a question of opportunity. He chanced to have as one of his pupils 
at Bonn a young Brazilian named Jordano Machado. A collection 
of nephelene rocks taken from a railway tunnel on the Mogyana 
Railway near the city of Caldas had been sent Jordano Machado, 
and he had chosen the collection for the subject of his thesis. 
Hussak looked after the preparation and publication of this paper 
with great care and interest. Every one of the microscopic rock 
slides was examined by him personally and carefully. The thesis 
of Jordano Machado was a brilliant success, but the young petrog- 
rapher eventually gave up his petrographic work in order to raise 
~ coffee. 
At this point Hussak left his professorship in the university and 
went to Brazil with his pupil, who extended to him the cordial 
Brazilian hospitality of his father’s coffee plantation. His early 
experiences in Brazil were rather trying. On the coffee plantation 
there was really nothing for a mineralogist to do. Besides there 
he had no outfit for such work; he lacked microscope, slides, labora- 
tory, and all. After some months of this he felt that he must 
return to Germany; but unfortunately he had not even the means 
for the voyage. 
