Switch to the Hack Tool and fire a dart at the Security Camera on the wall in the next room. Hacking the Security Camera makes it work for you—stand back and watch as the Security Camera detects the Splicers and sends a pair of Security Bots after them. Take a few steps to the right and fire your Rivet Gun at the distracted Splicers.
Cross the Drafting Room to the west and enter the Jet Postal Room on the right. Eleanor has left you another Plasmid—Telekinesis—along with another plea for help. Telekinesis enables you to pull distant objects towards you, then either use them, drop them, or hurl them through the air at an enemy! Take the Plasmid and head up the stairs around the corner. You’re going to have to find a way around that locked door to Workshop 6B.
Continue up to the balcony and use Telekinesis to grab hold of one of the large gas cylinders. Approach the edge and release the Fire Plasmid button to send the flammable gas hurling down towards the Splicers near the fire. Quickly use Telekinesis to grab a second cylinder and launch it at the Splicers emerging from the room across the way. Another option is to shoot the cylinder once to spring a leak, then pick it up and drop it over the edge with a tap of the Reload button. The cylinder still explodes, and may even set off a chain reaction.