Conductors and Insulators. In a conductor, electric current can flow freely, in an insulator it cannot. Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them.onductors and Insulators. In a conductor, electric current can flow freely, in an insulator it cannot. Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them.
Butterhead lettuce. A type of head lettuce whose botanical name is Lactuca sativa var. heirloom. Two common types are Boston and bibb lettuce. Have small, round, loosely formed heads with soft, buttery-textured leaves ranging from pale green on the outer leaves to pale yellow-green on the inner leaves.
Thornless, Podless, Non-Messy Honey Locusts: Shademaster and Sunburst. First of all, note that there are various kinds of locust trees. For example, black locusts are classified as Robinia pseudoacacia. But even within the Gleditsia genus, we have: Gleditsia triacanthos, thorny locusts. Gleditsia triacanthos var. inermis, thornless locusts.