National Geographic : 1910 Mar
RAT KILLED BY By the wonderful bacteriological preparation discovered and prepared by Dr. Danysz, of Pasteur Institute, Paris. Used with striking success for the past few years in England, France, and Russia. DANYSZ VIRUS contains the germs of a disease peculiar to rats and mice only and is absolutely HARMLESS TO BIRDS, HUMAN BEINGS, AND OTHER ANIMALS. The rodents always die in the open, because of feverish condition. The disease is also contagious to them. Easily prepared and applied. How MucH To USE.-A small house, one tube. Ordinary dwelling, three tubes (if rats are numerous, not less than 6 tubes). One or two dozen for large stable with hay loft and yard, or 5,000 square feet floor space in buildings. Price:. One tube, 75c.; 3 tubes, $1.75; 6 tubes, $3.25; one dozen, $6.00 . If you are troubled with roaches send us 25c. for a can of "SAL INSECTA," our new scientific bug exterminator. INDEPENDENT CHEMICAL CO. 19 OLD SLIP, NEW YORK CIOY TREES FOR FORESTRY PLANTING Catalpa Speciosa, Black Locust, European Larch, Hard Maple, American Beech, White Birch, Red Oak, American Linden, White Elm, Chestnut, Walnut; also SEEDS of above va rieties. EVERGREENS White Pine, Scotch Pine, Ponderosa Pine, Jack Pine, Austrian Pine, Douglas Fir, Balsam Fir, Norway Spruce, White Spruce, Red Spruce; $3.00 to $10.00 per 1,000. We also carry a large assortment of EVERGREEN Tree Seeds, both native and foreign. MANY MILLIONS TO OFFER We make a specialty of growing EVER GREEN and Deciduous Tree Seedlings for reforestation purposes. Our list includes all valuable native species at lowest possible prices. Send for special Forestry Price-list; also free booklet entitled "Plant Catalpa Speciosa Trees for Profit." Mention this Magazine. D. HILL EVERGREEN SPECIALIST BOX 305 DUNDEE, ILL. FOUNDED 1855 Several Glasses at the Price of One DA-NITE Binoculars combine in ONE instrument ALL the service formerly possible only in several glasses. High and Low Power, fitted equally for day or night use-all this serv ice in the same glass by simply turning little metal discs while ;L\ Y \ holding the tfe-I IT( glass. are far the I" 1fel most service able and convenient for travelers, tourists, automobilists, sportsmen. DA-NITE Binoculars cost less than half as much as glasses r of restricted power and use- ome only $15.00 postpaid, includ- wAt ing handsome leather carrying B)~AjAE case and cord for glass. Send for Booklet F-4. McINTIRE, MAGEE & BROWN CO. 723 Sansom Street, Phila., Pa. Your courtesy in mentioning the Magazine when writing will be appreciated The Reflecting Lantern or Post-card Projector, in its various forms, is doubtless the most universally useful projection instrument ever invented. With it a collection of post-cards or engravings becomes a source of endless amusement and instruction. With it also natural specimens, such as Flowers, Leaves, Minerals, Butterflies, etc. are shown in All the Colors of Nature We manufacture our Projectors to show Opaque Pictures and Objects Lantern and Microscopic Slides We offer thirty different styles, covering every possible requirement and ranging in price from $4.50 to $200.00 We also make Magic Lanterns, Cinematographs, and have 40,000 Lantern Slides for sale or rent. Lists free. Manufacturers and Patentees WILLIAMS, BROWN & EARLE, 918 Chestnut St., Dept. 17, Phila., Pa.