Scientific apparatus and instruments, namely, furnaces for laboratory experiments in the nature of crystal growing; laboratory equipment, namely, casting dishes for processing and growing crystalline materials and laboratory tongs for removing crystals from casting dishes for processing and growing crystalline materials; lockable Petri dishes used in laboratory research in the nature of processing and growing crystalline materials using directional solidification, zone refining, skull melting and cold-crucible melting techniques; electric laser measuring systems for use in electric cuffing, grinding, cleaning and polishing of ingots, blocks and wafers of silicon; electric laser devices for projecting a visible line on ingots, blocks, and wafers of silicon to be cut by a power saw; silicon photo voltaic cells and modules; laboratory apparatus and instruments for the exchange of substances and heat for use in chemical vapor deposition and crystallization and purification of silicon; furnaces for laboratory scientific research and development experiments; electric control panels for use with all the foregoing; laboratory equipment, namely, crucibles; and optical fiber cables