Edison : his life and inventions . enlo. There was also Mr. Charles , who devoted himself mainly to engineeringmatters, and later on acted as chief engineer of theEdison Electric Light Company for some there were William Holzer and James Hippie,both of whom took an active part in the practicaldevelopment of the glass-blowing department of thelaboratory, and, subsequently, at the first Edisonlamp factory at Menlo Park. Later on Messrs. Jehl,Hippie, and Force assisted Mr. Batchelor to installthe lamp-works of the French Edison Company atIvry-sur-Seine. Then there were Messrs.


Edison : his life and inventions . enlo. There was also Mr. Charles , who devoted himself mainly to engineeringmatters, and later on acted as chief engineer of theEdison Electric Light Company for some there were William Holzer and James Hippie,both of whom took an active part in the practicaldevelopment of the glass-blowing department of thelaboratory, and, subsequently, at the first Edisonlamp factory at Menlo Park. Later on Messrs. Jehl,Hippie, and Force assisted Mr. Batchelor to installthe lamp-works of the French Edison Company atIvry-sur-Seine. Then there were Messrs. Charles , Samuel D. Mott, and Charles T. Mott, whodevoted their time chiefly to commercial affairs. conducted most of this work, and later on tooka prominent part in Edisons electric-railway experi-ments. His business ability was on a high level,while his personal character endeared him to us all. 274 § 2-D^ (D :ip ^ *5dc*P o o o h32 :3 w d O > o o S 3 c« si jq y3- >• 3 WP ^ cdpp 3 COS- o c 3 ro o 00 00. MEMORIES OF MENLO PARK Among other now well-known men who came to usand assisted in various kinds of work were , Worth, Crosby, Herrick, and Hill, whileDoctor Haid was placed by Mr. Edison in charge ofa special chemical laboratory. Dr. E. L. Nicholswas also with us for a short time conducting a specialseries of experiments. There was also Mr. Isaacs,who did a great deal of photographic work, and towhom we must be thankful for the pictures of MenloPark in connection with Edisons work. Among others who were added to Mr. Kruesisstaff in the machine-shop were Messrs. J. H. Vail andW. S. Andrews. Mr. Vail had charge of the dynamo-room. He had a good general knowledge of machin-ery, and very soon acquired such familiarity with thedynamos that he could skip about among them withastonishing agility to regulate their brushes or tothrow rosin on the belts when they began to on he took an active part in the affairs andinstallations of


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