Show NEW PROCESS FOB FOR BLEACHING G ROSIN jt A a recent meeting of the liverpool chemists association mr mercer exhibited d a specimen pe of purified and bleached rosi rosin n a substance he said which at first might inight not appear to be of much interest or importance but the bleaching indof of rosin was a problem which had bad occupied the attention of the most eminent chemists and hitherto without success now however the problem had been teen solved and a taken out by Aless diess rs and hunt of manchester by which common black rosin worth only as ad per cwt cat was conva conia converted ted into i A beautiful white article worth Ws las per cwt cat to obtain this result the rosento rosin to be purified is place placed d in a still with a receiver ad and pipe in in connection with a boiler is introduced into and reaches to the bottom of the still where it radiates into var lobes maller malier pipes perforated so asto allow of the edif of steam the still is heated until the rosin melts meld when steam is admitted and thoroughly permeates the entire contents coil coll tents the temperature of the them still at the same time being raised to degrees at which it is maintained until all the contents of the still capable of being have passed anti into the receiver rece receiver iier iper the contents of which at the close of or the operation will be found to consist ol 01 fluid and solidS the former being water and the latter iatter the ble bie bleached a chel chea rosin holding a quantity of moisture in suspension after the water has b been elii driven off by re melting the rosin has tle beautifully white transparent appearance a r an ce of the specimen on an the table D dr k alpe edwards v i r d s the i chairman noticed the importance of the mal maj ter thus communicated and now nov that it had been mado made khon one was wag only surprised that tha it had bad been so long undiscovered the process was so simple he aiso also descanted des canted on the valtie value which was calculated to afford in the he various chemical investigations journal of 1 I 1 com corn |