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Pagina 68 - They used before to work with a buoy to the cylinder, enclosed in a pipe, which buoy rose when the steam was strong and opened the injection, and made a stroke ; thereby they were capable of only giving six, eight, or ten strokes in a minute, till a boy, named Humphrey Potter, in 1713, who attended the engine, added (what be called коддая) a catch, that the beam always opened, and then it would go 15 or 16 strokes a minute.
Pagina 36 - They shall be affixed one at the front and the other at the rear of the transport unit, both perpendicular to the longitudinal axis of the transport unit. They shall be clearly visible.
Pagina 219 - ROWE, STUART H. The Physical Nature of the Child. By Dr. Stuart H. Rowe, Professor of Psychology and the History of Education, Training School for Teachers, Brooklyn, NY Cloth.
Pagina 57 - What is it that constitutes and makes man what he is ? What is it but his power of language — that language giving him the means of recording his experience — making every generation somewhat wiser than its...
Pagina 128 - SINCE its foundation, the Cavendish Laboratory of Cambridge has held a very prominent position, not only as the home of the teaching of physical science in one of our great universities, but also as the centre of a vigorous and prolific school of scientific research. The history of the laboratory must always be intimately associated with the scientific labours of the three distinguished holders of the chair of experimental phyics in the University of Cambridge, J. Clerk Maxwell, Lord Rayleigh, and...
Pagina 255 - ... was an original member of the National Academy of Sciences of the United States, and in the year 1854 occupied the presidential chair of the American Association for the Advancement of Science.
Pagina 184 - Winter," by Monochrome; and, in a lighter vein, the " Walrus " gives an account of the weird inventions of " My Friend Choggles," and " Pettifer " prattles about hi» experiences of winter photography. THE report of the ninth meeting of the Australasian Association for the Advancement of Science, held at Hobart. Tasmania, in 1902, has now been published.
Pagina 278 - London in the summer of 1913, and, in this connection, an exhibition of rare and curious objects relating to Medicine, Chemistry, Pharmacy and the allied sciences is being organized by Mr.
Pagina 74 - ... what material is necessary and how to obtain and use it. The author has been successful in producing a valuable manual of work for children whose school years close with the common school course. The numerous woodcuts are useful and to the purpose. Unfortunately for English readers the country for which the book is especially designed is the eastern States of North America. OV APLIN. THE NATURE OF ELECTRICITY AND THE CONSTITUTION OF MATTER. Conduction of Electricity through Gases. By JJ Thomson,...