. Baltimore and Ohio employees magazine . s are included,which will prove specially helpful to those pre-paring for examination. 362 pages, 88 illustra-tions. Cloth. Link Motions, Valves and Valve Set-ting. By Fred H. Colvin, Associate Editorof American Machinist. A handy book thatclears up the mysteriesof valve setting. Showsthe different valve gearsin use, how they work,and why. Piston andslide valves of differenttypes are illustrated andexplained. A book thatevery railroad man inthe motive power de-partment ought to illustrated. Newrevised edition recentlypublished. vs cent
. Baltimore and Ohio employees magazine . s are included,which will prove specially helpful to those pre-paring for examination. 362 pages, 88 illustra-tions. Cloth. Link Motions, Valves and Valve Set-ting. By Fred H. Colvin, Associate Editorof American Machinist. A handy book thatclears up the mysteriesof valve setting. Showsthe different valve gearsin use, how they work,and why. Piston andslide valves of differenttypes are illustrated andexplained. A book thatevery railroad man inthe motive power de-partment ought to illustrated. Newrevised edition recentlypublished. vs centb Locomotive Boiler Frank A. Kleinhans. The only book showing how locomotive boilersare built in modern shops. Shows all types ofboilers used; gives details of construction;practical facts, such as life of riveting punchesand dies, work done per day, allowance forbending and flanging sheets and other datathat means dollars to any railroad man. Secondedition. 451 pages, 334 illustrations. Six fold-ing plates. Cloth. S3. BO. COPIES OF THESE BOOKS SEWT PREPAID OW RECEIPT OF PRICE The Baltimore and Ohio Magazine Mount Royal Station Baltimore, Maryland Please mention our magazine when writing advertisers Baltimore and Ohio Magazine. July, iQ2i PATENTS BOOKLET FREE. HIGHEST REFERENCESPROMPTNESS ASSURED. BEST RESULTS. Send drawing or model for exatninatiod andreport a* to patentability. WATSON E. COLEMAN PATENT LAWYER S24 F Street, N. W. Wachinston D. C Have you $521? The population of the United States isdivided into two classes of people, says theVulcan Bulletin, those who are contentedand those who are discontented. Thereare men who think that everything is wrongand those who, although not contendingthat everything is right, believe that thingsare more nearly right than wrong. Theman who thinks that things are all wrongusually has some definite plan to right trouble with him is, however, that hehas little knowledge of natural or economiclaws and his plans w
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