190

PHILADELPHIA, OCTOBER 1st, 1880.

DEAR SIR:

We desire to call your attention to our

NEW BOTANICAL SERIES,

consisting of 24 microscopic preparations (mostly double stained), illustrating
the structure of the higher orders of plants. They are all neatly mounted
on 3x1 slides, and will, we feel sure, be found valuable for private study as
well as for class demonstration. The following is a list of the structures and
cell contents shown:

1. Protoplasm and Nucleus in cells of Cypripedium pubescens.
2. Simple Cellular Tissue, Parenchyma, in Stem of Elder.
3. Parenchyma, Stellate form, in Rush, Juneus tenuis.
4. Woddy Tissue, in White Oak, Quercus alba, 2 sections.
5. Pitted Wood-cells, in White Pine, radial section.
6. Annular Vessels in Impatiens fulva.
7. Spiral Vessels in Castor-oil plant.
8. Pitted Vessels in stem of Nerium Oleander.
9. Scalariform Vessels in Fern, Osmunda.
10. Medullary Rays, in stem of Mahogany, 2 sections.
11. Endogenous Stem, Smilax rotundifolia.
12. Laticiferous Tissue, in Leaf of Rhyncospermum.
13. Stomata, in Leaf of Cypripedium acaule.
14. Rootlet of Lemna, showing Root-cap, etc.
15. Stellate Hairs, on Leaf of Deutzia gracilis.
16. Stinging Hairs of Nettle, Urtica dioica.
17. Internal hairs, in Water-lily, Nymphaea odorata.
18. Glandular Hairs on Leaf of Sundew, Drosera.
19. Oil-glands, in cuticle of Lemon.
20. Chlorophyll grains in Leaf of Moss, Hypnum.
21. Starch Grains, in Canna root.
22. Aleurone, (Proteine grains), in Seed of Ricinus.
23. Raphides, in Leaf of Fuchsia.
24. Cystoliths, in Leaf of Ficus elastica, section.

Price, in neat polished Case, with four trays, $15.00.

Our stock of Optical, Mathematical and Philosophical Instruments is the largest and most varied to be found in the United States, and is constantly receiving accessions of improvements and novelties. Our complete Catalogues sent by mail, on application, as follows:

PART 1st, MATHEMATICAL INSTRUMENTS, 160 pages.
PART 2d, OPTICAL INSTRUMENTS, 188 "
PART 3d, MAGIC LANTERNS AND SLIDES, 150 "
PART 4th, PHILOSOPHICAL INSTRUMENTS, 188 "

Respectfully Yours,
JAMES W. QUEEN & CO.,
OPTICIANS,
924 CHESTNUT STREET, PHILADELPHIA.