ADVERTISEMENTS. 
ttt 
WOTICES 
Notices for scientific RE and private individuals inserted under this head free of charge. 
r business houses, two cents per word. 
INERALOGY. — Course conducted by 
First collection and 
Central High School, Pittsburgh, ‘Pa. 
wes: D—To correspond with concholo- 
s in America, especially in California, 
with a ‘vie to exchange. Many British land, 
arine duplicates; some for- 
i ress Mrs. Falloon, Long Ashton Vic- 
arage, Bristol, k nd, 
ANTED—Position in Academy, Normal 
or High School, as teacher of the Natural 
Sciences and Modern ages. Latin taught 
in addition, if Pigs fs Address G., box 441, 
Hanover, N. H 
i PROFESSOR of Natural 
d German, of four years ex- 
perience ia pae Biological training received 
at the Universities of Leipzig and Bonn, Ger- 
many, is open for a position in a college. Good 
references. 
Address, C., Box 136, New Berlin, Pa. 
OR EXCH ANG E.—ı14 Volumes (1883- 
1889) AMERICAN JOURNAL OF SCIENCE; 
to volumes (1880-1889) AMERICAN NATUR- 
LIST; 21 volumes (1879~1890) ENGLISH ME- 
eane] all in good condition for rap 
also, Morris Typewriter. If you have a 
Microscope, Camera, or eden else to a 
please send full descriptio: 
E.R. CHADBOURN, LEWISTON, ME. 
| FoR 
SALE.—Beautiful sets of Fossil Plants 
from the Dakota Group Cretaceous. On 
receipt of $3.00 I i Pe seem prepaid, to any 
a 
and varieties of Dakota Plants. Send 5 “cents 
| for plate illustrating the set. The specimens will 
| equal the figures. CHAS. H. STERNBERG, 
Box 60, Lawrence, Kans. 
Waxtep=ars works on Palzontology, 
nd other works Siar’ plates which show 
fossils of the Niagara E ddress M. D. 
| Sullivan, St. Ignatius College. Chicago, Il], 
ae I., IL., TIH, and IV., of. THE 
RICAN NATURALIST, in first-class con- 
| dition, Soul in half Morocco, for sale. ce 
| $16.00. Address GEO. W. MACKAY, 
25 Congress St., Boston, Mass. 
| W.: ANTED—For dissection and microscopic 
J- A. Leighton, Trinity College, T oronto, Can. 
| [> eee FOR EXCHANGE for other shells 
sea or land, very fi 
‘i trigon, 
levissimus, rectus, alatus, gra 
| ventricasus ; Margaritania confrogosis, com- 
| Planata, rugosa, gi bbosus, and oth A 
| donta — and suborbiculata. 
| six of th Anadonta suborbiculata by 
mail re one bese 
Dr. W. S. STRODE, BERNADOTTE, ILL. 
ld. 
eira pat rapa y tor the 
in ee D e 
i 40e. Teto 
ntion thie ] go pie ea A of 
New York, Kingston-on-Hudson. 
Gorpen Hitt Scuoot, 
A Preparatory School for Boys. 
$450 Per Annum. 
JOHN M. CROSS, A.M., Principal. 
