A. A. Hayes—Red Oxide of Zine of New Jersey. 191 
transformation, or whether they are derived, to some extent, 
from their point of departure in paleontology, «7 ¢., from the 
supposed animal nature of Hozoon. is is a question whose 
solutions we leave to those whom it concerns. For our own 
part, we persist in thinking that science ought to keep strictly 
within the sphere of observed facts, and remain completely 
Independent of every theory which may tend to lead it into 
the sphere of imagination.” 
Arr. XXVI—On the Red Oxide of Zine of New Jersey; by 
Aug. A. Hayss, A.A.S. 
Tats mineral, discovered and analysed by the late Dr. Bruce 
of New York, was subsequently examined by M. Berthier. 
In his “'Traité des Essais par la voie Séche,” 1834, are his 
tesults, in which no allusion to the cause of the rich red color 
°F this mineral is made, but the remark, “le manganése y est 
probablement a l'état de deutoxide,” closes the description. 
n the year 1845 I made some analyses of this beautiful min- 
tal for my late friend, Mr. Frank Alger, who was then com- 
adopted by Mr. Alger, and expressed in his published work, 
and subse uently Prof. Dana quoted the analysis and opinion 
in his standard work on Mineralogy. In the years, since passed, 
the subject has been several times discussed by scientific friends ; 
‘nd when doubts of the sufficiency of the cause have been ex- 
Pressed, a resort to ocular proofs at the moment has been deemed 
®onvincing and satisfactory. tee 
Jn turning to the description of this mineral in the 5th 
Edition of the admirable system of Mineralogy by Prof. Dana, 
T was surprised by the statement that the tinguished and 
‘ccurate author had found, by “means of a high magnifying 
3 Wer, that this ore is free from foreign scales of red oxide 
iron.” 
Dr. Lewis Feuchtwanger had kindly sent me a large cabinet 
‘pecimen of a finely colored mass of this mineral engaged in 
- At some points of junction the red oxide seemed to 
