U. S. & CAN.] THE NATURALISTS' DIBECTCKY. 171 
4146 Osier, Wm., Prof. Johns Hopkins Univ., Baltimore, Md. 
Biol, Entoz., Photog. ? 
4147 Osmond, I. Thornton, A.M., Prof. Physics, State College, 
Centre Co., Pa. Physics* 
4148 Osmun, Gilbert R., Fresno, Calif. Ast. t 
4149 Ott, Harvey N., Prof. Zool., Physiol. and Animal Pathol., in 
S. Dakota Agric. Coll., Brookinga, S. Dakota. Zool., Mor- 
phol., Emb., Vert, and Invert. Anat. C. Ex.* 
4150 Otten, A. H., 17i W. 3rd St., Cincinnati, Ohio. Chem. 
4151 Ottoma, Jarecki, 622 State St., Erie, Pa. Inorg. Chem., 
Photog* 
4152 Overacker, Minnie L M Teacher of Bot., Syracuse High 
School, 138 Linden St., Syracuse, N. Y. Bot: Phcen. 
Plants, Ferns. C. Ex.* 
4153 Overton, John S., Book and News Dealer, Southern Hotel, 
St. Louis, Mo. Numis. 
4154 Owen, E. T., Prof, in Univ. of Wisconsin, Madison, Dane 
Co., Wis. Native and Exotic Lepid. C. Ex. Desires 
price-lists of Lepid. Offers in exchange some 2000 species 
of Exotic Rhopalocera, Spinges and Bombyces. Will ex- 
change Exotics for U. S. Lepidoptera on favorable 
terms.* 
4155 Owens, Wm. G., A.M., Prof. Chem. and Phys., Bucknell 
Univ., Lewisburgh, Pa. Chem., Phys., Elect.* 
4156 Oyster, Dr. J. H., Paola, Kan. Med. Bot., Phcen. Plants. 
C. Ex. for Herbarium specimens from all parts of the 
world. Have a large number of duplicates from many 
parts of the country. Greatly interested in the medicinal 
properties of plants. Wish to accumulate a complete and 
general botanical library.* 
4157 Pace, E. C., Ashley, 111. Arch. 
4158 Packard, John C., High School, Brookline, Mass. Physics.? 
4159 Packenthal, John S., Care of Glendon Iron Co., Easton, Pa. 
Chem., Metall.* 
4160 Paddock, Miner H., A.M., Prof. Sciences, High School, 23 
Crescent Ave., Jersey City, N. J. Palceo., Geol., Jfm., 
Cry stall., Lithol. C. Ex. Buys mineral material by the 
pound and by the specimen for educational purposes. 
Correspondence solicited.* 
4161 Page, John W., M'etamora, Woodford Co., 111. Geol. C. ? 
4162 Paine, Prof. J. A., Ph.D., Cur. Metropolitan Mus. of Art, 
Central Park, New York. Residence, Tarrytown, N. Y. 
Phcen. Bot., Ferns; Arch., Bibliog. C. Ex.* 
4163 Palache, Chas., Berkeley, Alameda Co., Calif. Strat. Geol., 
Min., Crystall., Lithol, Inorg. Chem. C.* 
4164 Palm, Charles, 172 East 64th St., New York, N. Y. Lepid. 
Has Florida Lepid. to Ex. for Western. 
4165 Palm, Wm. L., E. & C. Blk., Denver, Colo. Bot., Geol., 
Phys., Zool., Orn., Ool. C. Ex.* 
4166 Palmer, Asher, Kennett Square, Chester Co., Pa. Ool., Tax. 
