Page:Popular Science Monthly Volume 72.djvu/604

 New School Projection Lantern C

Every teacher today recognizes the advantages to teacher as well as pupil of the wider use of the Projection Lantern in the classroom.

Our Lantern C has been especially designed for school work. It is a thoroughly high-grade Apparatus, and while equipped with our latest improvements we can offer it at a price which brings it within the reach of even the elementary school. The construction of this Lantern is such as to permit the instant change from ordinary projection to microscope projection, and thereby adds greatly to its scope of usefulness.

The advantages of a Lantern in the social affairs of a school ivill ajso readily suggest themselves.

This device is simple, efficient, portable — may be easily re- moved from one room to the other — and practically covers the whole range of school projection work. Price complete, $50 ; with Acetylene Burner, $45. Send for descriptive circular.

Bausch & Lomb Optical Co

Carl Zeiss, Jena Offices:

New York Boston Chicago

ROCHESTER. N. Y.

George N. Saegmuller San Francisco Washington London Frankfort

WATSON & SONS' EDINBURGH Student's Microscope Model " H "

The most popular British made Mi- croscope.

It combines all the requirements that original re- search, high-power work and photo- micrography call for, including coarse and fine Ad- I justments of high- est precision, me- chanical move- ments to stage and compound Sub- ^-^a stage, with screws

><!S ^^^S 9b to center and rack work to focus.

Stand only, price £ 9 12 6

With § and J Objectives, 2 oculars, Abbe Illuminator with Iris diaphragm, and

Mahogany case 15 o

Oil Immersions ^j " 1.20 N. A 4 '0'

1.30 " :~ BSOjO

Illustrated 178 page catalogue of microscopes" and accessories mailed free on request; more than 20 models to select from at 37/6 up Microscopes may be imported free by Educational Institutions.

WATSON & SONS, Microscope Manufacturers,

WHOLESALE AND RETAIL

313 HIGH H0LB0RN, LONDON, ENGLAND

Estaqlished 1837. Awarded 42 Gold and other medals — micro- soopie Objects may be conveniently sent to the U.S.A. by parcel post. American Agents: The Scientific Shop (A. B. Pobtbb) Booms 1230- 1245 Monon Building, 324 Dearborn Street, Chicago, through whom orders should be sent.

For showing on the screen opaque objects, book Illustrations, engravings, and lantern slides. It is the most perfect instrument of its kind. It has a detachable Book-Holder. It concentrates all light on the object. It shows printed matter correctly. It is in use at

Harvard, Cornell, U. of P., Leland Stanford, Girard College and hundreds of other institutions.

Wireless Telegraph Outfits

For school room and experimental work. Com- plete sending and receiving stations.

Lantern Slides — Microscopic Slides

Illustrating' Botany, Geology and other sciences.

L,ists on application.

WILLIAMS, BROWN & EARLE,

Dept. N, 918 Chestnut Street, Philadelphia, Pa.

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SOU) AT0UR STORES 8 BY GROCERS EVERYWHERE.