| Show COLORED FIRES it may be taken for granted that many rea dors ders will be inta interested rested to learn how the colored fires with which the birthday of our country is is popularly celebrated are prepared the process of combining the materials is simple striking hing differences in color tire are produced by slight changes in in composition the 11 western I 1 Druggist gives somo formula which clear up tip the mastery of these strange ij effects for the production of red green yellow and blue fires one fifth part of tb the composition is shellac As this is a constant quantity it is apparent at once that the shellac has nothing to do with determining the color it serves the purpose that charcoal does in the ina manufacture nu facture of gunpowder it holds tile the other elements in desired form and regulates the rate of combustion another aith part of these seve bevearl tirl compounds is th alls chlorate of potassium this is used for the deto detonating nitting effect to startle the beholder with the crabl crackling cling sound and with the scattering of the fire of itself it would give a white light and would burn with intense energy it im imparts larts go to the kocl rocket ct the three fifths are what give color to th ho hame flume they differ of course in in 1 the four compounds for producing 0 red fire nitrate of str is used for green iii ni arafe of bf ba barium i gium k tor or yellow nit nitrate ritte of sodium tini aud and for blue ammonia sulphate of copple copper sv i As s we find nitrates used for th the first three c col ol 01 ors na named ined it is plain the effect is determined f t by 4 the use respect respectively i ivel of brot strontium t lum ft I 1 I 1 i A p I 1 I 1 1 I barium and podium it is 1 equally w true tl thia lt f j blue is the result ms eilf of the burning of copper 11 violet viole faud and purple flames k tire are composite lute I 1 I 1 f c to produce the vi violet 0 li i linie limo and copper and sulpher are arc burned together to ealier for purple strontium i nul and calomel a are re burned with just jus t a little ittle copper the f fumes miles of ca calomel loniel a are r e particularly harin harmful ful add all 11 chec HU sub suba zt ua ll 11 ces yield gases that auit ta i t 0 ot t t to 0 b re CA ly breathed vf vry ay iy sti ikin r effects could be ol oi tai using c 1 arsede and nd other iw im har ilar elemen its but t their air use would be dangerous to health |
