A doffer is someone who removes bobbins, pirns or spindles holding spun fiber such as cotton or wool from a spinning frame and replaces them with empty ones. Historically, spinners, doffers, and sweepers each had separate tasks that were required in the manufacture of spun textiles. From the early days of the industrial revolution, this work, which requires speed and dexterity rather than strength, was often done by children. After World War I, the practice of employing children declined, ending
Redvine (Brunnichia ovata) tendrils coil upon contact. Thigmotropism is a directional growth movement of curvature which occurs in response to stimulus of contact. Thigmotropism is found in twining plants and tendrils. After initial contact with support due to nutation, the tendril or twiner shows less growth in the region of contact and more growth on the opposite side. As a result, they bend around the support.
According to Penn State University, the theory that plants can actually benefit from humans talking to them was first published in a book from 1848, written by a German professor named Gustav Fechner.Since those early days, many more books have been written about the idea of plants responding to sound stimuli.lants that are repeatedly exposed to wind produce a hormone that keeps them short, with thick stems to help them stay rooted. Other researchers have proposed that itâs the carbon dioxide produced by human speech that has an effect on plant growth, but that theory isnât well-established.