Show SECRET INKS those who wish to carry on a secret correspondence with their friends should try invisible or sympathetic ink A whole page may be filled with writing rit and still be entirely white as if there a word it in this way it may be tent sent any distance and no one can find out what it contains but the person who receives it knows the secret of bringing out the writing so that it may easily be read one ot of the simplest of these there invisible inks Is a very diluted solution of sulphuric acid buy 5 cents worth of the acid at a drug store and pour in a con eld erable quantity of water at least three or four times as much as there Is of the acid now write with this solution using an ordinary pen and olot alot the surplus csink ink as you go along to make the writing show black all our correspondent has to do Is it to hold the letter close to a hot stove when preto outcome out come the letters and w words one by bv one so that they may easily be read Ano another good secret ink more difficult to bring out than the one already mentioned can be made by using a cheap solution of sugar suar of lead to bring out the u written words it is necessary to sponge the letter with a 1 solution of of ammonia another simple secret ink is made of a weak solution of ordinary starch A letter written with this will mill remain entirely invisible until it is 16 washed with a solution of iodine which quickly brings out the writing in using secret ink it Is best to write an ordinary letter telling about the weather and other important things and then between the lines write with the secret ink this will serve to lead astray any one who sees the letter because there could be no suspicion of anything written between the lines chicago record |