Fig. 1From: Comparative analysis of the Potter Tower and a new Track Sprayer for the application of residual sprays in the laboratoryThe Potter Tower. The Potter Tower is shown (A) with a close up on the nozzle and three arms with the adjustment screws on the three stands (B), and the coverslip positioning on the spray table (numbered 1–4), raised on Bostik Blu Tack®, with four moveable discs to secure the Petri dish (C)Back to article page