In the Ader transmitter as many as twelve carbon pencils were employed, arranged in a series of two groups with six pencils in parallel in each group. These were supported at their ends in parallel carbon bars, which were carried by a nearly horizontal wooden diaphragm.
And all these groups, while talking among themselves, tried to keep near the commander-in-chief (whose bench formed the center of the gathering) and to speak so that he might overhear them.
I never had patience to arrange more than five or six groups at a time.
Groups of people will do science this same way.
By the entrance of amino or hydroxyl groups into the molecule dyestuffs are formed.