Mahlon Pitney, Fillippon v. Albion Vein Slate Company…
“ We entertain no doubt that the orderly conduct of a trial by jury, essential to the proper protection of the right to be heard, entitles the parties who attend for the purpose to be present in person or by counsel at all proceedings from the time the jury is impaneled until it is discharged after rendering the verdict. Where a jury has retired to consider of their verdict, and supplementary instructions are required, either because asked for by the jury or for other reasons, they ought to be given either in the presence of counsel or after notice and an opportunity to be present ”
