1. What clues are we given about the work Dr. Jekyll does in his laboratory on pg 34?

We see that "normal" science experiments were not done there. Something extraordinary and unnatural was happening.

It was the first time that the lawyer had been received in that part of his friend's quarters; and he eyed the dingy, windowless structure with curiosity, and gazed round with a distasteful sense of strangeness as he crossed the theatre, once crowded with eager students and now lying gaunt and silent, the tables laden with chemical apparatus, the floor strewn with crates and littered with packing straw, and the light falling dimly through the foggy cupola. At the further end, a flight of stairs mounted to a door covered with red baize; and through this, Mr. Utterson was at last received into the doctor's cabinet. It was a large room, fitted round with glass presses, furnished, among other things, with a cheval-glass and a business table, and looking out upon the court by three dusty windows barred with iron. A fire burned in the grate; a lamp was set lighted on the chimney shelf, for even in the houses the fog began to lie thickly; and there, close up to the warmth, sat Dr. Jekyll, looking deadly sick. He did not rise to meet his visitor, but held out a cold hand and bade him welcome in a changed voice.