His genius as an inventor is revealed in many details of the great concentrating plant....
As he went on, concentrating on becoming a goldfish in the bowl on the table, he became aware of a humming sensation in his head.
Then read it aloud, concentrating solely on the thought that you are expressing--do not trouble about the sentence or thought that is coming.
At the time Calhoun started for Kentucky, General Halleck was concentrating his immense army at Pittsburg Landing, preparatory to an attack on Corinth.
The Edison concentrating plant has been sketched in the briefest outline with a view of affording merely a bare idea of the great work of its projector.
"In my experimental plant for concentrating iron ore in the northern part of New Jersey, we had a vertical drier, a column about nine feet square and eighty feet high.
This iron-ore concentrating project had lain close to Edison's heart and ambition--indeed, it had permeated his whole being to the exclusion of almost all other investigations or inventions for a while.
So these two lines of work were taken up by Mr. Edison with just as much enthusiasm and energy as is usual with him, the commercial failure of the concentrating plant seeming not to affect his spirits in any way.
The second item was the ingenious and varied forms of conveyor belt, devised and used by Edison at the concentrating works, and subsequently developed into a separate and extensive business by an engineer to whom he gave permission to use his plans and patterns.
The cornea of the eye of the Cat, and of many other animals, has a great power of concentrating the rays and reflecting them through the pupil. Professor Bohn, at Leipsic, made experiments proving that when the external light is wholly excluded, none can be seen in the Cat's eye.