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Home > All Images > 2002 > October

October Gallery

Choose from 537 pictures in our October collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Brunels tunnelling shield Featured October Image

Brunels tunnelling shield

The tunnelling shield, or excavating machine designed by Sir Marc Isambard Brunel (1769- 1849) & used in the construction of the lining of the Thames tunnel. The shield (right) consists of twelve frames, which could be edged forward independently, supporting the side of the tunnel while allowing bricklayers to work from it. A moveable stage enabled building materials to be brought up to the level of the advancing face of the lining. The tunnel, running under the Thames between Rotherhithe & Wapping, was begun by Sir Marc Brunel in 1825 & completed in 1873 after his death. It was designed for foot passengers & later taken over by London Underground

© SCIENCE PHOTO LIBRARY

Spider mite, SEM Featured October Image

Spider mite, SEM

Spider mite. Coloured scanning electron micrograph (SEM) of a spider mite (Tetranychus sp.). It is an economic pest and plant parasite, found on vegetable crops, fruit trees and flowers. It feeds on the leaf sap, which causes leaves to mottle, turn yellow and fall off. The spider mite is named due to its ability to spin a web, which it does across a leaf surface that secures and protects it against predators. Their numbers can be controlled with organophosphorus pesticide, although some resistance has developed. Another method is biological control, using a natural predator, such as gall midge larva (Feltiella acarisuga). Magnification: x135 at 6x7cm size

© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY