Singular Streams

1847 Scientific American  
We are often puzzled at the amount offalse meipts which . we see daily published in \"a rious pwers, most of which are perfectly use· less. ,No receipt ought to be published confi· dently, unless it has bpen the subject of expe· ri ment. There is one thing w h ich we are 80rry to see a n d which they display, viz. a grrat and u n i v ersal want of science. We have Ioe en a rece i p t for !!l aking wood incomhll,ti Jill' by a mixt u re of soda, flom paste, and clay. Alum and soda alone possess
more » ... oda alone possess th e incombusti ble qual I t ies , without the use of the plaster. Alumina is the basi s ot all clays. Again, we hay/! seen in m ore than oni) papcr, a great bu mber of recei pts on coloring, purporting to lie new and discovered lately in London. To dye an orange , the receipt 8"YS, " take r.urcu· ma, tartar and the mUl"late or tin nnd boi! five minutes" (the goods.") " To dye green use the same stu m. only add chemic blue," that iS8ul phate of indigo, " and boil the sam e lengt h of t i m e as for yellow." This is destruction indeed. Th e muriate of t i n will destroy e n . tirely the e ffec ts of the c hem ic, and silk will t Ike "n no color by boili ng. We say never boil silk to dye it. Another receipt for cotton black says, steep the colton in the chloride of li me. Th is is �hocking. The ch lori de of li m e 19 the stuif' used to bleach, dlschQrge co lors, not dye them. To those of ou r mecha· nics' or fa rmers' w i v es or daughters, who wish to dye silk, we say , never boil it, but use the dye at a good heat. We will shortly give a number ot receipts on d}eing and the meth· od of llsing them and will recommend the same as practical, chea p and ill successful use by tl.e best dyel·s. Agai n, we perceive in a cotemporary paper, a recfipt for making incombust.ible p a per , by infus i on in a dilute solution of alum and gun· powder." Such utter ign orance of chemistry ! What use is the gu n powder as it regards an incombustible, u n less it be just to destroy by its comb ustible qualities, a portiun of the in· combustible quality of the alumo Relief" 1'"0.' Toor.n Ache.
doi:10.1038/scientificamerican07031847-328h fatcat:7sed4tp5cjaaxj2l25kiwijqfu