Show W RIO g N POPULAR SCIENCE favi I 1 te hn cal aducat on and trade tae question of the influence ot of tech leal education upon trade has lately been much discussed in eng land the president of the society of Chera chemical ical industry in n liverpool gives some of the reasons why ter xer many Is now advancing so rapidly as follows follo s 1 superior economy thor ough ness attention to detail 2 rahe I 1 he pc session of a large number ot of mea men trained not only technically but lib arall 3 A close alliance of legisla tion and of science with the interests of trade i A national system ot or railways and canals 5 cheap skill ed labor working long hours 6 A large supply of unskilled laborers aheady trained to habits of order and discipline by army service 7 krotec tive tariffs 8 A good s stem of pat int tnt laws he proposes these remedies for england I 1 the appointment of a minister of commerce 2 the nationalization of railways and can ale als 3 the extension and improvement of secondary edu education cadon 4 A reform of patent laws tae a question discussed is acute in england and it 1 Is not without interest in america the remedies proposed are not at all needed here and to some of them a at least consent could not now be ob tamed stars recorded by photography the number of stars recorded on a photograph i plate depends not only OB on the region of the heavens to which the telescope is directed but on the length of exposure at the bonn observatory atory a map of the northern heavens was made every star visible in a small telescope tele ope et of boat about three laches aperture tt U we call all the number of f stars shown on this reap map unity the greenlick Green wick photo graphs with an eleven faich lack telescope show that in twenty seconds three and a half times as nany stars are recorded in six minutes fifteen and a half times as many and in forty rat seventy three times tames as a many by increasing the exposure more stars are visible but the ie iu crease Is not indefinitely great so far ar as these observations go they how show either that the number of stars la is not infinite or that the light et of tars altars Is absorbed in space electromechanical clock la IR an electromechanical clock the combination with a clock cloctt train rain of a T 7 18 49 D a so 10 10 24 1 2 4 E 0 93 0 34 34 23 40 20 4 normally stationary contact arm means for actuating said arm from said clock train at predetermined in a plurality of contact pins in the path of said arm an electric bell in circuit with said contact arm and pins whereby an intermittent alarm Is sounded at predetermined intervals thomas E heeter st louis mo Is the inventor jewelers circular the question of fuel every one is familiar with discus about the rate at which the world s coal supply Is being exhaust ed attention may be called to the possibilities of wood systematically cultivated for fuel helmholtz Helm boltz snow ad d that in germany the thermal value 0 of the vegetable growth on a given area of land Is about 1 part of the heat delivered by the sun to the same area by planting rapidly grow ing timber in tropical countries the german rate can be increased about fifteen times so that about one per cent tent of the thermal energy poured upon the land by the sun may be stored as wood fuel taking acres of 0 land as available tor for forest cultivation it follows that a perpetual fuel product of thirty times our present coal supply might be secured and moreover Is it hopeless to expect that a way will be found to store the energy dally daily received from the sun and to do away with fuel altogether electricity the latest word on electricity Is to the effect that it la Is a material sub stance its unit the electrons elec trone forms an infinitesimal part of the atom of any a element and when split off it produces a stress in the other similar to that due to negatively electrified body the severing of the electron from its atom Is the generation of electricity the remainder of the atom acts as a positively charged body but it Is not certainly known whether the positive electron supposed to be about ten times as heavy as the negative really exists new egg testing method A german genius says he has dis covered a method by which he can tell the age of an egg up to five weeks from the time of hat hatching thing indicating not only whether the egg Is fit to eat or not but also testing eggs tor for hatch ing purposes much more accurately than can now be done by the candling method herewith is 19 given an illus bl 4 1 4 I 1 of the simple apparatus which be he uses and also the rom complete formula for the liau d in which the tests are made as given in the patent papers filed in this country the liquid ought to be about 1025 1 specific weight and is composed of one liter of water twenty five grams of ordinary salt eighty five grams ot of glycerin of about 28 degrees baume and one gram of concentrated sail salt bylic alcohol A fresh egg it is stated will go to the bottom of this mixture and he ile there in an almost horizontal position an egg from three to five days old mill be at an angle of about twenty degrees an eight day old egg will describe an art angle of forty five degrees a fourteen day egg of sixty degrees and a three week egg will take a position corresponding to sev enty five degrees an egg four weeks old will stand upright on its pointed end an egg of five weeks will be sus in the liquid and an egg be 0 graduation lines ind cate age of egg yond that age or a foul egg will swim en on or near the surface of the liquid ft X these statements prove true this apparatus will prove to be useful for hooking preserving hatchl hatching 9 and all other purposes per poses the glass face of the containing vessel is graduated to andl aate the above mentioned degrees observations of the sun A complete observation of all the variable elements of the sun is feces sary it if we are to obtain the hey key to sotor phenomena and to their connect tion with weather magnetic elements and other terrestrial matter the sun a face must be photographed dally daily so as to record all spots etc the entire chromo chrome sphere must also be registered preferably embly by autom automatic atiq and the radial velici ties of must be deter mined also automatically the spec tro observations outlined in what precedes are regularly made at the observatory of meudon deudon and nowhere else on the earth at the pres ent time the used by hall of chicago was not re mounted when the yerkes observe tory was established in 1897 eng land has lately resolved to begin a series of observations like those of meudon deudon and chicago at two stations one at home and one in india mont pelee belee heard in an venezuela the united states consul at mara cabibo venezuela miles hom mar unique reports that the sounds of the explosions of mont pelee belee were heard by himself and many others a rev alution was in progress in venezuela and the inhabitants of certain towns thought the sounds due to artillery which was not the case 1 I he consul s servant without orders brought a horse saddled and bridled saying that he was s ire the consul would wish to go to the city where a big battle must be going on judging from the cannonading the consul describes the noise as not at all like the reports of heavy guns it was not like thunder nor the strange rum bling of earthquakes but as if it im mense explosions were taking place high in the air there can be no doubt from the dates and times that these sounds were due to mont pelee belee oil burner for stoves in these days of worry over lack ot of fuel when people are wondering how they are to heat their buildings and cook their food numerous schemes are being proposed in solution of the problem among these for coal one of tha the most prominent and successful Is petroleum and it Is a special form of burner for this fuel which Is pictured below the erigina tor of the invention being elmoro elmore stewart of los angeles cal the claim Is made that this burner cian can be used in connection with a cooking or heating stove hot air furnace steam and water heating system steam boll boil er or hotel range giving a strong hot flame without danger of explosion the burner Is composed of two separ ate parts one resting in the and the other forming the lid to re fed from supply tank place the ordinary cover of the stove the lower section has a central core rising from a flat base with a sui rounding flange high enough to pr pro vent possible overflow of the oil into the beneath the cover has a central depression with a perforation of sufficient ize to permit the drol ping of oil through it ai the of the cone beneath |