Such are the principles and methods by which fireworks may be made; but we would advise our young friends to be very cautious, and never to attempt making any fireworks by candlelight; always to select some outhouse for their operations; to see that no iron or steel implements are about the place in which their fireworks are being manufactured, or they may go off before they wish it; to use wooden or brass implements in the bruising, grinding, and sifting of their mixtures; and never to bring the fireworks, or any of their ingredients, into the dwelling-house, or they may suddenly receive a “Heavy blow and great discouragement.” To Make an Illuminated Spiral Wheel. Procure a circular horizontal wheel two feet in diameter with a hole quite through the nave, then take four thin pieces of deal three feet long each, and three-quarters of an inch broad each. One end of each of these pieces is to be nailed to the felloe of the wheel at an equal distance from one another, and the other end nailed to a block with a hole in its bottom, which must be perpendicular with that in the block of the wheel, but not so large. The wheel being thus made, a hoop planed down very thin must be nailed to the felloe of the wheel, and wound round the four sticks in a spiral line from the wheel to the block at the top; on the top of this block a case of Chinese fire must be fixed, and on the wheel any number of cases, which must incline downwards and burn two at a time. The axis of the wheel must be a little longer than the cone, and made very smooth at the top, on which the upper block is to turn and the whole weight of the wheel to rest. [THE END.] * * * * * USEFUL AND INSTRUCTIVE BOOKS. HOW TO KEEP AND MANAGE PETS--Giving complete information as to the manner and method of raising, keeping, taming, breeding, and managing all kinds of pets; also giving full instructions for making cages, etc. Fully explained by 28 illustrations, making it the most complete book of the kind ever published. Price 10 cents. Address Frank Tousey, publisher, New York. HOW TO DO ELECTRICAL TRICKS--Containing a large collection of instructive and highly amusing electrical tricks, together with illustrations. By A. Anderson. Price 10 cents. For sale by all newsdealers, or sent, post-paid, upon receipt of the price. Address Frank Tousey, Publisher, New York. HOW TO WRITE LETTERS--A wonderful little book, telling you how to write to your sweetheart, your father, mother, sister, brother, employer; and, in fact, everybody and anybody you wish to write to. Every young man and every young lady in the land should have this book. It is for sale by all newsdealers. Price 10 cents, or sent from this office on receipt of price. Address Frank Tousey, publisher, New York.