What patentable and what not.- New Manufacture. Prior Publi-
cation. True Inventor.-Different Means, same Result.- Public
Use.-Prior Inventors. Experiments. Unexpired Patents.— New
Combination. Analogous Use. - Public Sale.- Patent must be
vendible. Improvements. - Title. Principle. - Chemical Disco-
veries. Medicines. - Ingredients, &c.-Foreign Inventions.- New
Substance. — Mechanism. — Improved Machinery.— Slight Combi-
nation.-New Principle.-Amount of Ingenuity.-Deceit.-Invention
made by two Persons.- By Another. Provisional Specification.
No Government Guarantee. - Patent and Specification linked by
Title. Inappropriate Title.-Complete Specification.- Full Disclo-
sure. Extraneous Matter.- Ambiguity.- Vague Words. - Aban-
donment of Part.— Drawings, Models, &c.— Effects not resulting.
Plural. Omission. — Unnecessarily expensive Materials. — Subse-
quent Improvement. - Machinery. Its Parts. - Two Machines.