Arizona republican., 1902-11-25

care of themselves, this stage being reached by 16 to more than Al per cent of the fry, although no previous eXperi- ment had even one per cent of sur vivors.
 That certain substances adhere sc tenaciously to glass as to bring away scales was observed long ago by Prof. Cailletet. For etching he applies two coats of thin glue. and after twenty five hours places the article on a kitchen range at not over 105 degrees Fahrenheit. The glue will detach it. self with numerous flakes of glass. The designs may be varied by adding various salts, the best results being had from glue containing alum.
 The electrict target of Captain Chas. Chevallier, of the French army. is a |, series of metal segments. When pro- jectile strikes a segment, an electric circuit is completed by two or more spring-suppOrted rods at the back, and the exact spot struck is signalled upon an annunciator.
 About fifty earthquakes yearly dis turb the earth throughout its mass. Professor John Milne notes that be- | tween January l, 1899 and January l. 1902, the world shaking earthquakes numbered 196,Of which % originated west and south of Alaska, 14 west of | Central America. 12 west of the Andes. 2S east oi north Japan, fl south and east of Java, r north of Mauritus. 3 in the north Atlantic and II in the Bal kan. Caucasian and Himalayan re- gions. These sources. all submarine but the last three, are near | the hgCe nf ba boundary ridges mostly lined with vol canic peaks. Both on land and under sea, the great earthquakes seem to attend a deepening of the furrows, and an elevation of the fianking ridges; and the elevation may reopen long sealed volcanoes, as in the eruptions in the Antilles in 169S. 1718. 1766, 1797, 1892 | 1872, 1886 and 1902. The small earth quakes, of which 10000 a year are re- corded have no visible connection with the volcanoes.
 The new image transmitting appara- tus of Belgian engineer includes two | synchronous motors, each the size of an egg, which are mounted at the two stations. and are driven by the same 1 current at the same speed of 800 reyo- 1 lutions a second. On each armature IS a small lens which in every 500 revo- iutions oscillates five degrees from the axes. The transmitting lens thus
 sees over a circle of ten degrees. and the variations of light and shade in 1 the spiral path are instantly transmit ted through a selemium cell to the same points on the receiver and are thrown on screen by the second lens. The entire spiral being passed ten | times second, the image on the screen | appears continuous
 The smallest vertebrates hitherto known have been several fishes of the southern states, the shortert about an inch long. A new goby-named mis- tichthys luzonensis-is reported from a lake of southern Luzon. and averages only about half an inch in length. Caught in great numbers by the na- tives this tiny species is a food fish of some importance
 Various metallic substances are nul- veriZed in the electric furnace by heat ing to volatilization. and then forcing into a collecting chamber by a jet of air or inert gas. Among useful DOW ders produced are those of bronze tin and aluminium; of litharge, or lead oxide; and of chrome steels, used as abraslVes. Variations of the process give such compounds as white lead.
 The improved self luminous mixture Of French chemist, claimed to re- quire only very short exposure to light and be unusually brilliant and lasting.
 consists of 20 parts of dehydrated so-
 d1um carbonate, of sodium chloride.
 Of magnesium sulphate, 800 of stron-
 tlum carbonate, and 15O of sulphur.
 The well mixed materials are kept
 white hot for three hours in an air
 tight muffle.
 Silence is golden only when applied