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hall's illustrated catalogue of magic lanterns, etc. 3 All claims must be made a short time after receipt of the goods, otherwise no allowance will be made. Not accountable for breakage. The amount of bill may be remitted by sight drafts on Boston or New York. Insurance against breakage in transportation, two and a half per cent. Marine insurance at current rates, from one to two and a half per cent. All goods purchased will be packed with* great care, with cost of box added to bill. As we always have a large stock of Instru- ments on hand, we can fill orders immediately on reception. But it sometimes happens that we are out of some styles of Pictures ; in that case, we are obliged to delay the order until we can make them, which is never over two or three days, as we have long- experienced workmen, and the best facilities for manufacturing. Persons ordering Catalogues will please send stamps for postage. OUR OPTICAL AND SCIENTIFIC DEPARTMENT Will be found replete with apparatus and appliances for the illustra- tion of the leading phenomena in the following branches of Physical Science, also the best works in the different departments of science. photography, hydraulics, electricity, chemistry, pneumatics, meteorology, mineralogy, acoustics, electro-metallurgy, mechanics, optics, magnetism, hydrostatics, astronomy, light and heat. The whole of this department is under my own personal direc- tion, and my long experience in manufacturing instruments is a sufficient guaranty for the quality of the apparatus sold by me. THE NEW BOOK ON THE MAGIC LANTERN. We have great pleasure in recommending to our friends and the public an able little work on the Lantern, entitled " The Magic Lantern : How to Buy it, and How to Use it, and How to Raise a Ghost by a ' Mere Phantom.' " All the various articles necessary for showing the whole of the effects, either with one or two lanterns, and a minute description of the method of using them, with hints on the selection of slides, &c, are fully set forth in it. We would earnestly beg our customers to purchase the book with the lantern. It will be sent post free on receipt of one dollar.