A handbook of Nature-Study for teachers and parents, based on the Cornell Nature-Study Leaflets, with much additional material and many new illustrations. The Comstock Publishing Company Cornell Heights, Ithaca, N. Y. ==================================================== Bausch & Lomb Optical Co. 154 Sutter Street San Francisco, California Factories: Rochester, N. Y. and Frankfort, a/M, Germany Use a =PROJECTION LANTERN= in your home. Our Model B Balopticon is plugged into an ordinary electric circuit, =without= special wiring. The Opaque Balopticons actually project, successfully, photos, pages of books, diagrams, without needing lantern slides. We are also the headquarters for Microscopes, Laboratory Apparatus, Prism Field Glasses, Biological and Entomological Supplies and Engineering Instruments. Write for catalogs. ==================================================== New No. 65 Spencer Microscope ADVANTAGES EXTRA LARGE STAGE, 112 × 108mm. ARM 75mm FROM OPTICAL AXIS. LOW COMPACT CONSTRUCTION. BLACK LACQUERED BODY TUBE. GENUINE VULCANITE COVERED STAGE. IRIS DIAPHRAGM OPERATED BY A KNURLED RING EASY TO REACH. AUTOMATICALLY LUBRICATED FINE ADJUSTMENT BEARINGS. NEW TYPE HANDLE ARM. SYMMETRY OF OUTLINE. BEAUTY OF FINISH. SUPERIOR OPTICS. IDEAL FOR LABORATORY WORK Send for Revised Price List for 1914 Spencer Lens Co. BUFFALO, N. Y. [Illustration: =No. 65B= 16mm and 4mm objectives Double nosepiece One eyepiece Cabinet Discount to schools =$31.50=] ==================================================== CLASS WORK MATERIAL CAN BE PROCURED AT ANY TIME OF THE YEAR FROM C. S. BRIMLEY, Zoologist 1135 Newberne Avenue RALEIGH, N. C., U. S. A. Twenty-one years' experience Price List on Application ==================================================== Entomological News A forty-eight page illustrated magazine, published monthly except August and September, devoted to the study of INSECT LIFE. It contains a list of the titles of the current Entomological Literature, and also articles by the leading Entomologists in the United States and Canada. Valuable information for the beginner, the economic entomologist and the systematist. To new subscribers, $1.90; Renewals, $2.00; payable in advance. Single copies 25 cents. Address ENTOMOLOGICAL NEWS 1900 Race Street, Philadelphia, Pa. ==================================================== Reichert's Scopes are Good Scopes IS YOUR'S A REICHERT?