gg • Transactioxs of the American Institute. 



No. 392. Engine Lathe, small size. (Chelsea Machine Works.) 

 Its merits are: 1. Its general design, sound material, and this mate- 

 rial varied in kind, so that it can best resist the kind of wear to 

 which the several parts are exposed in use. 2. That it is made 

 upon the sj-stem of duplication, or gauge work. 3. The pro- 

 visions which have been made in every possible way to compensate 

 for wear by adjustments. 4. The method of confining ahd adjust- 

 ing the table of the tool -rest on the slide. 5. The frictioual 

 operations of the slide-rest to secure prompt action of the tool. 

 6. The method of finishing those parts most exposed to wear, by 

 scraping, and not by filing with emery or emery cloth. 



This machine shows a great advance in that class of tools, which 

 have now become so necessary in producing the gauges, taps and 

 other instruments used in all classes of machine manufacture where 

 duplication is an element; and the more of such machines we have 

 the more rapid will be our progress in exactness of execution and 

 economy of production. We therefore earnestly recommend that 

 the hiohest honors of the Institute be awarded to it. 



o 



No. 539. Engine Lathe, cross feed. (Hall, Washburn & Co.) 

 Its merits consist in the simplicity of the cross-feed device, the 

 great excellence of workmanship in all its parts, and the material 

 being good and sound. We recommend it to your consideration 

 for first class honors. 



No. 873. Engine Lathe. (H. D. Stover.) This lathe is made 

 of good sound castings, is exceedingly well proportioned and 

 well made throughout; good square work and finish, and a credit 

 to the exhibitor. 



No. 356. Foot Lathe. (Adam Stewart.) Its merits are, excel- 

 lent material, good design and accurate, first class worlanansiiip and 

 high finish. It is, therefore, respectfully recommended to first class 

 honors. 



No. 537. Bolt and Screw Cutting Machine. (New York Steam 

 Engine Company.) Is a first class tool in all respects, and entitled 

 to the highest consideration. 



No. 874. .Planer. (H. D. Stover.) Its merits are, good design, 

 good sound material, and good workmanship and finish in all its 

 details. It works with less shock on short work than is usual with 

 machines of its size and weight. A first class machine and cntited 

 to first class honors. 



No. 542. Crank Planer. (New York Steam Engine Company.) 

 The only one of the kind exhibited. But Ave consider it entitled 



