With what two materials did edison experiment in order to make filaments

answer: because they get bored or smth idk

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

what are the answers

the constitution gives congress the power to regulate commerce "among" the several states.