The present invention is directed to novel substituted cyclopropane ethers compounds of the general formulae selected from the group consisting ofwherein R represent a hydrogen or a straight, branched, or cyclic hydrocarbon moiety consisting of less than 15 carbon atoms and containing single andor double bonds and R1 represents a methyl or ethyl group. Structural members each partition off a space between nearby image forming cartridges mounted to the apparatus body. The invention also relates to a novel fibrinolytic enzyme actinokinase extracted from said microorganism and to a process for the extraction of said enzyme. Each bow spring has an opening at each end thereof adapted to receive the internally upset material, with the internally upset material so formed to extending into the bow spring opening thereby locking the end portion of the bow spring within the externally formed U shaped upsets. Large volume is to be understood as, for example, 3000\u20134000 m3 on a surface of 2000 m2 and a height of 2 m as is the case with a storage tank of 50 m diameter and a liquid column of 3 m.