50 THE O. & O. SEMI-ANNUAL. 
For 75c. will sell small box (10x5)of 29 Rocky Mountain minerals, 1 piece 
iron ore, 1 piece gypsum from Syracuse Salt Works, 1 piece native copper 
from shore of Lake Superior, box Monterey pebbles, stone from geyser, I 
garnet bearing mark, 1 pe. Kaylin. Will be sent by express and charges 
paid by receiver. 
PERCY GRANNIS, Skaneateles, N. Y. 
To ExcHaNnGe.—Will exchange eggs and skins for Vols. of the Youth’s 
Companion for the years 781, ’82 and ’83. 
L. D. RicHarps, Kirkwood, Fond-du-lac, Wis. 
To ExcCHANGE.—One prize holly lathe for the best offer of hawks or 
owls’ eggs in sets with data. Write first. 
FRANK Darrow, Corning, Iowa. 
” and 
WANTED.—One copy each Langille’s ‘‘Our Birds in Their Haunts’ 
‘““Coues’ Key to N. A. Birds” (third edition.) Parties having the same or 
any other works on Ornithology and Oology to dispose of at a discount 
from regular prices for cash, please write 
B. H. Hoac, Stephentown, N. Y. 
Correspondence desired regarding the habits of Screech Owl (egascops 
usio.) 
Mary D. Hussey, M. D., East Orange, N. J. 
Will exchange ‘‘Wonders of the Sea and Land,’’ Hugh Miller’s works on 
Geology and other books for back numbers of the ‘“Auk” or books on Nat- 
ural History. 
J. M. Kecx, Chardon. Ohio. 
To ExcHANGE.—Bird skins, rare species: from the north-west. Only A 
No. 1 specimens given or received. 
Gro. G. CANTWELL, Lake Mills, Jefferson Co., Wis. 
Bird skins and finely mounted specimens to exchange for skins, curios- 
ities and scientific books. 
E. W. Martin, Medina, Ohio. 
W ANTED.—-First-class birds’ eggs in sets with data. Send list and re- 
ceive mine. ie 
H. C. CAMPBELL, Lansingburgh, N. Y. 
An air rifle to exchange for eggs in sets with full data or birds in the 
meat. 
i. B. Peck, Clifton Springs, N: Y. 
WaANTED.—To buy, sell or exchange, any quantity of Natural History 
specimens of all kinds. I make a specialty of Mexican art goods, opals and 
turquoise, Aztec pottery and Indian relics. Send lists and receive mine. 
Wm. L. McDANIEL, Mineola, Wood Co., Texas. 
