Luther L. Miller, Chicago, Illinois. "Trade Marks."' Pages 32. Paper. 5 by 6 inches.

A UNIQUE BOOKLET explaining the law of trade marks of the United States and foreign countries. "Commercial Importance," "Trade Rights in the United States," and the "United States Revised Statutes" are among the subjects treated.

Lodge & Shipley Machine Tool Company, Cincinnati, Ohio. Pages 80. Paper. 6 by 9 inches. CATALOGUE OF LATHES AND ATTACHMENTS designed especially for highspeed steels. Illustrated by excellent half-tone engravings and line drawings of details-Engine Lathes 14-inch to 48inch; Turret lathes; combination of Engine and Turret ; and attachments.

The Standard Tool Company, Cleveland, Ohio. Pages 224. Paper. 41-2 by 7 inches. CATALOGUE of Twist Drills, Reamers, Spring Cotters, Taps, Keys, Milling Cutters, and other Tools. The catalogue also contains tables such as decimal equivalents, standard screw threads, wire gauges, metric system, etc.

Brown-Corliss Engine Company, Milwaukee, Wisconsin. Pages 48. Paper. 7 by 10 inches.

CATALOGUE of Brown-Corliss engines, showing horizontal and vertical types, both cross- and tandem-compound. The details, especially the valve gear, are well illustrated by half-tone engravings. This company makes both single and double eccentric engines. In addition to the above-mentioned engines, they build blowing engines, rolling-mill engines, mining machinery, compressors, and gas engines.

The Green Fuel Economizer Company, Matteawa, N. Y. Pages 96. Paper. 6 1-2 by 9 1-2 inches. THE CONSTRUCTIVE DETAILS of the economizer are first explained, special attention being given to the scrapers and reversing gear. The results of tests, illustrations of installations, and a list of companies using the Green Economizer, form a large portion of the catalogue.

Garvin Machine Company, New York City. Pages 210. Paper. 4 by 7 inches.

CATALOGUE of milling machines, lathes, and their parts and attachments. A large variety of index centers, milling cutters, cutter grinders, etc, are shown. Calculations and simple rules for gearing up engine lathes for screw-cutting, and for spirals on dividing head, are also given.

Olds Motor Works, Lansing, Michigan. Pages 36. Paper. 6 by 9 inches.

CATALOGUE on gas and gasoline engines. eral full-page cuts showing various The Olds engine is illustrated by sev

views and sizes. The details-connecting rod, crank, cylinder, spark igniter, etc. are explained and illustrated.

Reeves Engine Company, Trenton, N. J. Pages 48. Paper. 6 by 9 inches.

THE REEVES COMPOUND ENGINES are described in a neat catalogue printed on coated paper. The excellent half-tones, especially the sections, add much to the attractiveness of the catalogue. This company make vertical and horizontal compound engines for belted and direct connection.

Kellogg Switchboard & Supply Company, Chicago, Illinois, U. S. A. Magneto Switchboards. Pages 103. Size, 6 1-2 by 9 inches.

THIS CATALOGUE follows the bulletin mentioned in our May number on the Magneto Telephone, and describes the workings of the small switchboards of the Kellogg Company. It is often possible to find more practical up-to-date information in a well-planned catalogue than in a textbook, and any one interested in switchboards would find this pamphlet very interesting and instructive. It is well illustrated, and contains numerous diagrams. Among the subjects taken up are express type switchboards; combined drops and jacks; combined ringers and jacks; cord circuit apparatus; operators' circuit apparatus; and other accessories of the switchboard.

Luther L. Miller, Chicago, Illinois. "Trade Marks."' Pages 32. Paper. 5 by 6 inches.

A UNIQUE BOOKLET explaining the law of trade marks of the United States and foreign countries. "Commercial Importance," "Trade Rights in the United States," and the "United States Revised Statutes" are among the subjects treated.

Lodge & Shipley Machine Tool Company, Cincinnati, Ohio. Pages 80. Paper. 6 by 9 inches. CATALOGUE OF LATHES AND ATTACHMENTS designed especially for highfor highspeed steels. Illustrated by excellent half-tone engravings and line drawings of details-Engine Lathes 14-inch to 48inch; Turret lathes; combination of Engine and Turret ; and attachments.

The Standard Tool Company, Cleveland, Ohio. Pages 224. Paper. 41-2 by 7 inches. CATALOGUE of Twist Drills, Reamers, Spring Cotters, Taps, Keys, Milling Cutters, and other Tools. The catalogue The catalogue also contains tables such as decimal equivalents, standard screw threads, wire gauges, metric system, etc.

Garvin Machine Company, New York City. Pages 210. Paper. 4 by 7 inches.

CATALOGUE of milling machines, lathes, and their parts and attachments. A large variety of index centers, milling cutters, cutter grinders, etc, are shown. Calculations and simple rules for gearing up engine lathes for screw-cutting, and for spirals on dividing head, are also given.

Olds Motor Works, Lansing, Michigan. Pages 36. Paper. 6 by 9 inches.

CATALOGUE on gas and gasoline engines. eral full-page cuts showing various The Olds engine is illustrated by sev

views and sizes. The details-connecting rod, crank, cylinder, spark igniter, etc. are explained and illustrated.

Reeves Engine Company, Trenton, N. J. Pages 48. Paper. 6 by 9 inches.

THE REEVES COMPOUND ENGINES are described in a neat catalogue printed on coated paper. The excellent half-tones, especially the sections, add much to the attractiveness of the catalogue. This company make vertical and horizontal compound engines for belted and direct connection.

Kellogg Switchboard & Supply Company, Chi

cago, Illinois, U. S. A. Magneto Switchboards. Pages 103. Size, 6 1-2 by 9 inches.

THIS CATALOGUE follows the bulletin mentioned in our May number on the Magneto Telephone, and describes th workings of the small switchboards the Kellogg Company. It is often sible to find more practical up-to-da formation in a well-planned cat than in a textbook, and any on ested in switchboards would pamphlet very interesting an ive. It is well illustrated, numerous diagrams. Am jects taken up are expre boards; combined drop bined ringers and jac paratus; operator and other accesso