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.
An all-organic lettuce mix. A stunning mix of different colors, shapes and textures. Includes Green Oakleaf, Red Oakleaf, Green Romaine, Red Romaine, Lollo Rossa, Red Leaf, and Bibb lettuces. Suitable for outdoor production or in low-light conditions present in hoophouses and greenhouses. Similar to our popular Allstar Gourmet Lettuce Mix but organic.