my heater 10 be operable with propane gas with this in mind reference will now be made to fig6 in which an end plate 183 corresponding to the end plate 83 is shown instead of the wick 92 there is a propane nozzle 192 at the upper end of a feed tube 194 since the feed tube 94 in the embodiment of fig1 3 is fixedly attached to a lower plate 83 through which it extends what appears in fig6 constitutes a simple assembly that can be used to replace very readily the assembly shown in fig2 and 3 involving the lower plate 83 and the feed tube 94 that is fixedly attached thereto by virtue of the brazing or welding 96 reference has hereinbefore been made to pat no 3 501 257 the present applicant being one of the patentees so it can be explained that the connection of the heater 10 with respect to the block of an internal combustion engine is the same as depicted in my said patent more specifically the hoses 38 and 52 even though only fragmentarily illustrated in fig2 are connected to the engine block in the same manner as in my said patent inasmuch as the present invention is adaptable to being fueled with propane gas it may be helpful to briefly describe what is diagrammatically presented in fig5 with this in mind an internal combustion engine.