Mica

(noun.) any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves; used as dielectrics because of their resistance to electricity.

手打:罗谢尔

• Resting on the cylinder was a palladium-faced pen or spring, which was attached to a mica diaphragm in a resonator. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• Mica, which so many people know as isinglass, is one of the most important materials in the manufacture of the standard electric iron. 佚名. 神奇的知识之书.
• The result was a double heating element in the form of a V, the resistance wire used being symmetrically wound on a flat, thin mica core. 佚名. 神奇的知识之书.
• SHOWING A BOX OF IMPORTED MICA Above on the table, a stack of cores and several elements ready for insertion in the iron. 佚名. 神奇的知识之书.
• At the edge of the table is a stack of mica strips known as cores. 佚名. 神奇的知识之书.
• The heating element is of the radiant type, made of flat resistance wire wound on mica and placed in a vertical position between the two bread racks. 佚名. 神奇的知识之书.
• If a strip of glass, rubber, mica, or paraffin is introduced anywhere in a circuit, the current ceases. 伯莎M.克拉克. 科学通论.
• He suggested the cutting out of the mica pieces almost to the bottom, leaving the commutator bars separated by air-spaces. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• He was also the first to use mica in insulating the commutator sections from each other. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• After the required heat has been reached, the forgings are allowed to either cool in the air, be covered with pulverized mica, or quenched in a special solution, as the case may require. 佚名. 神奇的知识之书.
• Admitting then that gneiss, mica-schist, granite, diorite, etc. 查尔斯·达尔文. 物种起源.
• The highest grade mica comes from India and the open box in the picture shows thin, transparent pieces just tumbled out (Fig. 5). 佚名. 神奇的知识之书.
• It was in his machine also that mica was used for the first time as an insulating medium in a commutator. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• In 1834 William Marr of England patented a lining for a double metallic chest, filled with non-combustible materials such as mica, or talc clay, lime, and graphite. 威廉·亨利·杜利特. 世纪发明.
• The heating element is made of flat ribbon resistance wire wound on mica, then bent into the form of a cylinder to fit into the German silver shell. 佚名. 神奇的知识之书.

整理:威廉