- Email: [email protected]
Flame reactions with hydrogen gas
Items a~d lV~velties' Laoarly always used for tile rounding the porous cylinder doably perforated cork, fum interior with wtrious gases ; flask, C, nearly filled with a doubly perforated cork, the small tube terminating jusl the flask. If now carbonic acid gas i ducedi into E, the colored li C rises in B to a consi height ; a strong current of h~ through tile other tube call fluid almost instantly to be from C to a height nearly e that of the apparatus.
,ffpeeifiv G-ravity.--Fig. modification of the first, purpose of simply illustrati relative specific gravity of is an ordinary lamp ehiml upon the edge of the: funne ,/, is prolonged from the low to a considerabledistance. By !eading into e, a gas than the atmospheric air, th in ¢ rises in b; the heavier the higher the rise in b. Gases lighter than the air the gas the higher the column rise* :Flame :Reactions with Hy
has published some interesting observations ~on the phenomena usoelated with a hydio~ The gas is thor¢ (luently with nitrat, thrbugh a black ru] dark room free fl'ol the. flame pbSsess~s * Nature v. 485.
370
Editorial.
osity, extends upwards beyond the flame proper, to mOretitan' six t~mes its length. When brought rote " "contact " with " "sohd " : ~.dms, ": '": ' "m "m a ~ ~y cases phosphorescent effects' are produced. 8alidpap~i': l~rought i n t o it for a moment shows a vivid green light, remklniiig for some s e c o n d s after the flame is extinguished. Writing paper,m:~rb]e~gypsitm gtacl granite gave similar effects.' The presence of the lentiltrace 0f s u l phu:r,~either in the air in the delivery tube~, or upon t h e ' o b j e c t s ges¢~d, invar!gbly ~ause a deep blue coloration of t h e flame~ ~ s a Chemical r ~ 6 n t : i f o r detecting sulphur, the atit~hbr pr"6nounces t h e flam~ to he wonderfully se~Itlve. Phosphorus and its compounds g t v e a'gi;een color to the fl~me,:gnd carbonic acid at once imparts to i t a pa~e lilac tinge. ~,~,, : ":: ~ " i. ~. r o. m. t. h e s e ~ b ~ r :; c a t i o n s i~:woul~l seem that ure h d r o g e n u a i g h t :.• • P Y be:made s ervioea~]eln prod~icing phoslJhorescent effects, and in t e s t ifig f0~sligh¢ traces of sulpl~ur, phosphorus and cert~ain gases.
A New-Test for A r s e n i o . ~ B e t t e n d o r f * hassimplified H a g e r ' s and, it would seem~ has r e n d e r e d naceufieal preparations for s l i g h t al sulphuric acid for t r a c e s of the author's process. of tin, in a shallow, dish, is cos•12 sp. gr.).antil -it is dissolved. sulphuric acid to be, t e s t e d : the n. This addition wH.1cau.se eo~. is present the liquid:will r e m a i n c1¢a!¢. If arsenic ,ispresent in_ the smallest quantities the l i q u i d will be colored first yellow, then brown, and finally a dark greyish-brown, becoming at the same time turbid. . The process,• while far more readily carried out than M a r s h ' a , is declared to be nearly equal to it in delicacy. A N e w : P h o t o g r a p h i c P r o c e s s . - - h printmg proc6ss; by which a photographic image can be developed upon paper, se/i~itised ~ith Narieus metallic salts without the agency of light, has l a t 6 ] y b ~ e n an. nounced to the French Academy by Prof. Merger of L~ons. ~h¢ ~bservations upon which this process, which bears a v e r ~ r e m o t e re. semblance to the old daguerreotype, is founded, are state~ff:i'tob e that Dingler's J0ur., ccii, 385.
,ffpeeifiv G-ravity.--Fig. modification of the first, purpose of simply illustrati relative specific gravity of is an ordinary lamp ehiml upon the edge of the: funne ,/, is prolonged from the low to a considerabledistance. By !eading into e, a gas than the atmospheric air, th in ¢ rises in b; the heavier the higher the rise in b. Gases lighter than the air the gas the higher the column rise* :Flame :Reactions with Hy
has published some interesting observations ~on the phenomena usoelated with a hydio~ The gas is thor¢ (luently with nitrat, thrbugh a black ru] dark room free fl'ol the. flame pbSsess~s * Nature v. 485.
370
Editorial.
osity, extends upwards beyond the flame proper, to mOretitan' six t~mes its length. When brought rote " "contact " with " "sohd " : ~.dms, ": '": ' "m "m a ~ ~y cases phosphorescent effects' are produced. 8alidpap~i': l~rought i n t o it for a moment shows a vivid green light, remklniiig for some s e c o n d s after the flame is extinguished. Writing paper,m:~rb]e~gypsitm gtacl granite gave similar effects.' The presence of the lentiltrace 0f s u l phu:r,~either in the air in the delivery tube~, or upon t h e ' o b j e c t s ges¢~d, invar!gbly ~ause a deep blue coloration of t h e flame~ ~ s a Chemical r ~ 6 n t : i f o r detecting sulphur, the atit~hbr pr"6nounces t h e flam~ to he wonderfully se~Itlve. Phosphorus and its compounds g t v e a'gi;een color to the fl~me,:gnd carbonic acid at once imparts to i t a pa~e lilac tinge. ~,~,, : ":: ~ " i. ~. r o. m. t. h e s e ~ b ~ r :; c a t i o n s i~:woul~l seem that ure h d r o g e n u a i g h t :.• • P Y be:made s ervioea~]eln prod~icing phoslJhorescent effects, and in t e s t ifig f0~sligh¢ traces of sulpl~ur, phosphorus and cert~ain gases.
A New-Test for A r s e n i o . ~ B e t t e n d o r f * hassimplified H a g e r ' s and, it would seem~ has r e n d e r e d naceufieal preparations for s l i g h t al sulphuric acid for t r a c e s of the author's process. of tin, in a shallow, dish, is cos•12 sp. gr.).antil -it is dissolved. sulphuric acid to be, t e s t e d : the n. This addition wH.1cau.se eo~. is present the liquid:will r e m a i n c1¢a!¢. If arsenic ,ispresent in_ the smallest quantities the l i q u i d will be colored first yellow, then brown, and finally a dark greyish-brown, becoming at the same time turbid. . The process,• while far more readily carried out than M a r s h ' a , is declared to be nearly equal to it in delicacy. A N e w : P h o t o g r a p h i c P r o c e s s . - - h printmg proc6ss; by which a photographic image can be developed upon paper, se/i~itised ~ith Narieus metallic salts without the agency of light, has l a t 6 ] y b ~ e n an. nounced to the French Academy by Prof. Merger of L~ons. ~h¢ ~bservations upon which this process, which bears a v e r ~ r e m o t e re. semblance to the old daguerreotype, is founded, are state~ff:i'tob e that Dingler's J0ur., ccii, 385.