y.Strange to say, there are few pieces of apparatuswhich can be obtained in the world to-day whichwill assist in teaching geology. One of the most inter-esting we have seen was designed by Professor G. A.Lebour, of Durham College of Science, Newcastle-on-Tyne, and which was published in Nature.… … Pig. 2.—THE LAB&EST TBICYCLE IN THE WOBID. Fig. 3.—A BICYCLE BUILT FOB TWO. ers, so that a very slow motion can be imparted to thelatter. A sheet of India rubber is firmly attached bya, slot and screwed to each roller. This completes thearrangement, the rollers being wound through aboutone…
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