Microspore

(mi'-kro-spor). In biology: (a) an asexually-produced spore of relatively small size, as in the RAizocarpa, Selaginelhz, Isoetce; (b) One form of an i so spore among the colonial Radiolarians. Principal Parts of the Microscope. (Half natural size.) the objective, placed near the object, gives an enlarged and inverted real image. The other, the "i-uiar, lar, acting like a simple microscope, gives an ed virtual image of the real image. M., Erect one in which the image is made erect by means of Drisn prism placed above the objective. M., Oil-immersion, a compound microscope of which the free surface of the objective is immersed in a drop of oil placed on the cover-gla . M., Polarizing, one with a polariz- Micro sporidia. A genus of sporidia, a cla of the sporozoa. They occur as parasites in the muscles of the frog, the marsh-tortoise, in worms and insects. In silkworms they are held by some to be the cause of Pebrine, q.v.