(A) The Apparatus furnished consists of one hundred and five pieces. Over three hundred separate articles are used in making up this set. Most of it is ready for use when received. Seven pieces, however, are not assembled; but the parts can be readily finished and put together. (Sold, also, all pieces assembled.)
(B) The Text-Book—called "The Study of Elementary Electricity and Magnetism by Experiment"—gives full directions for two hundred experiments. (See table of contents, etc.) Price, post-paid, $1.25.
(C) The Apparatus List is an illustrated book devoted entirely to this special set of apparatus. Not given with first offer.
THE APPARATUS IS SIMPLE because the designs and methods of construction have been worked out with great care.
THE APPARATUS IS PRACTICAL because it has been designed for real use in "The Study of Elementary Electricity and Magnetism by Experiment."
THE APPARATUS IS CHEAP because the various parts are so designed that they can be turned out in quantity by machinery.
| 1st Offer: Pieces 1 to 50 | $1.00 |
| 2d Offer: Pieces 51 to 105, with part (C) | 3.50 |
| 3d Offer: Pieces 1 to 105, with part (C) | 4.00 |
| 4th Offer: Complete Cabinet, parts (A), (B), (C) | 5.00 |
| 5th Offer: Apparatus only, all pieces assembled | 4.60 |
| 6th Offer: Complete Cabinet, all pieces assembled | 5.60 |
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Express charges must be paid by you. Estimates given.
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A "Special Catalogue," pertaining to the above, with complete price-list, will be mailed upon application.
THOMAS M. ST. JOHN, 407 West 51st St., New York City