26 RECENTLY PATENTED INVENTIONS. taken moves the case nntil his eyes appear in the mir· Engineering. ror, then drops a coin in the slot, and a clockwork mechanism sets the machine in operatIOn, the picture STEAM STEERI�G GEAR. -John Ruswhen completed dropping through a chute upon a tray. sell, Long Island City, :-.. Y. In accordance with this I An electric light and !lash light mechanism are also inventiou a steam cylinder is held on suitable supports, provided for taking pictures at night.

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... h also serve as guides for pis � on rods, ports lead· DENTISTS' RUBBER DAM CLAMP.mg mto opposIte ends of the cylmder from a steam chest. The piston rods are each connected WIth a cro�8h('ad carrymg a pulley over which a tiller rope extend_, the tiller ropes bemg arranged at each end of the cylinder, so thut both ropes WIll move together, whde the steersman operates the wheel just as ir he were 8teerill.� by hand, It bClllg necessary to keep throwing it in order to keep the steam port of the cylinder open for the inlet of steam. BOILER AND PIPE COVERING.-Robert S. Miller, Wilmington, Del. This is an elastic com· position, to be put on in two coats, made of refined or washed kuolin, cow or goat nair, asbestos fiber, feld. spnr, plaster of Part�, rag pulp, etc., with water. The making and application of the compositIOn, as descri bed by the inventor, varies somewhat, but fuU instructions are given. It is designed to be tireproof and to cling close where applif'd without 8trsp8, while it is als.o an anti-rust, odorle88 and waterproof covering, a good non-conductor, and takes a hlgh polish.