RMMA7AY4–. Electronic apparatus for biological research . .^ - '/////yy/////A ... â|Hypodermic needle âCD ^ -Sliding surface Sliding surface Figure 35.19 Section through a simple manipulator used for constructing a group of electrodes quantities of Picene or other wax can be applied with the aid of a simple tool resembling a soldering iron. This consists of a thin wire soldered to a piece of thick wire which is surrounded by a small low voltage heating coil. The wax is applied while the tips are supported in place, as otherwise they are drawn together by the surface tension of the wax when fluid. A com