iy PREFACE
For the first-class engineer, he must be thoroughly acquainted and
able to answer all questions contained in this book. While he may
never be called upon to answer more than one-hall, it is safe to know
them all, as no hard-and-fast rules are followed by the inspectors at
examination.
The difference between the first-class grade and the second-class
grade is a more thorough and stringent examination of the first-
class.
The work fully covers all examination questions liable to be asked the applicants by the State Examining Board. The writer will be well repaid if through this volume the student finds means of improving his condition or of advancement to a higher grade.
To the following-mentioned manufacturing companies he desires that credit be given for supplying information and electrotypes relative to their product: American Steam Gage Company, Boston, Mass. The Locomotive: Hartford Steam Boiler Inspection Company; Mason Regulator Company, Boston, Mass; Putnam Machine Com- pany, Fitchburg, Mass.; C. H. Brown & Co., Fitchburg, Mass..
