Holbrook argus., 1904-10-01
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opened scientific information bureau at the Sorbonne, and the inquiries al- ready reach as many as twenty in sin gle days While special consideration is given to scientific matters in Paris md France, foreign subjects of French interest receive attention.
 The recent excitement in the cotton market has served to attract atten- ton to the possibilities of cotton rais- ing in various places where that indus try has not yet been developed. From Bogota, for instance, comes the in formation that in some parts of Colom- bia cotton can be seen growing wild on land that has never been tiled, and the newspapers of that country are trying to create sentiment in favor of the cultivation of cotton there. A remarkable instance of apparent mimicry in Ceylon has been brought to notice by Dr. A. Wiley. A fish, commonly known as the sea-bat, strik- ingly resembles a decayed leaf. and Q recent observer reports pursuing one of these fishes with small net when the creature suddenly disappeared, and the pursuer saw only yellow jak leaf gently and inertly sinking to the bot tom. AS he turned away, the sup posed leaf lighted itself and darted off.
 The appearance of solidity in photo graphs-the stereoscopic effect-is usu- ally given by two pictures taken from slightly different viewpoint Dr.. Gradenwitz describes a new single lens that shows far-distant image of photograph, free from distortion, and, under the same conditions of ap- parent size, distinctness, perspective. light and shade as those under which the objects themselves would be seen with short photographic objective. This conveys to the eye very natural effect, suggesting unconsciously cor rect perception of relief and dis tances.
 The steam-heating and electric lighting combination now being tested by Dresden promises to open new era in municipal economy. A huge central station of the Saxon govern ment contains ten generators, produc- ing over 55,000 pounds of steam per hour, and this is distributed through street mains to the Royal Opera House, the Picture Gallery, the Zwin- ger Museum, the Royal Palace and other buildings. After the morning heating, little steam is needed to keep up the temperature, so that most of the supply can be used for general ing electricity, for lighting and other purposes during the latter part of the day.
 In Germany, the home of technolog- ical instruction, there are seven spe- cial schools devoted to the sole purpose of training locksmiths and black smiths. They are in the cities of Burgstadt, Grossenhain, Frankenberg. Meissen, Glauchau, Rosswein and Zit- tau. Only graduates of public schools are admitted The course of instruc- ton in three of the schools lasts three years; in three of the others 1t is shorter To the school at Rosswein are admitted such students only as have completed a course in one of the other six schools, and the curriculum is highly advanced, covering physics, chemistry and electricity, with par ticular reference to practical construc- ton of machinery. The schools are supported by the blacksmith and lock smith gilds, aided by subventions from the government of SaXony and private benehcence.
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