Ground calcium carbonate compositions having narrow particle size distributions and a method for producing the compositions. The illumination apparatus includes an LED driving block including an LED bridge circuit formed from a bridge connection of a plurality of diode series circuits each of which is formed from a series connection of a plurality of light emitting diodes and a rectifying diode. The microcontroller is implemented to exclude any capacity to handle interrupts and so can provide guaranteed timing, and is preferably implemented to be small, simple, and programmable, and to store a small number of programs. The blades of the following reel then make cuts nearly perpendicular to those made by the circular blades. 779 Da, and hybrid proteins containing at least portions of its sequence. The carrying mechanism provides a rotation mechanism.