Show improvements AT JUMBO big mill turning out lots of plaster additional set of grinding rolls to he be installed to take care of land plaster A visit to the jumbo plaster works at sigurd is worth the trip the editor of the reaper accompanied see rotary detary N C poulsen last monday to the plant and was much taken with ft hat he saw there since the starting of the machinery in there has been a wonderful wonder tul lot of improvement at the mill A warehouse feet lonz long has ha been added and this is pretty well stoked with tile the completed product of the mill the floor is piled high with sacks of plaster representing each grade turned out at the mill in addition to the big warehouse ware houe e a store is under construction the foundation for a big hotel is 13 laid and the walls for the keene cement plant are fast assuming shape the country around the mill is dotted with tents the abodes of the workmen the first thing that attracts the attention is what appears to be clouds of steam which issue from the ven tila tors on top of the building on closer inspection this proves to be mostly the fine plaster borne into the air from the crushers eru sheri and from the drying kettles oi 01 calci ners ever tb thing I 1 n around the building is covered with the dust and the workmen are as nearly white men as the plaster dust can make them inside the mill all is bustle and work two men are busily feeding the crusher and a matter of 50 to so 80 t tons inper per day of crude gypsum is fed nto into the capacious maw of this device for or breaking tie te blocks of as ai they are delivered from the guarr the gravel gerum is then aiken to the rolls where it is reduced reduce il to powder this is conveyed to a huge bin and from here it is either sacked for lind and plaster or comeyer corn eyed to the calci cale ners iners where all the moisture is exuded and then the other grades of p abt astr r are made the land pl planter acter has proven to be one of the best sellers the compa company riv produces it has become so important that another set of rolls will have to installed the foundations for this improvement has been laid on the north end of the building 11 plaster will be elevated to a where it ean can be sacked by grai grait tn stead of the present system of sho ing the plaster into the sacks 1 I 1 additional rolls ara already ol oa 01 tl ti ground and will be installed in a short tune speaking of the rolls recalls recal lii one peculiar feature of the manufacture of plaster in every plaster mill in the united states it is areces reces sary to use a set bet of re ganding rolls in order to get the plaster reducer reduced to in the required fineness at the jumbo mill this has not been necessary as the gypsum is of such purity that the one set of rolls reduces the plaster to a fineness which is expressed as ninety to ninety five per cent passing over a mesh screen with a re grinding set of rolls other mills only manage to secure from 70 to 80 per cent of fineness passed over a screen this is a little short of marvelous and speaks volumes for the purity of the jumbo product after the plaster has been thoroughly roasted it passes to the bins on the floor above here is where the expert work of producing plaster is performed the grades of plasterers olaster ers material is ia fixed at this point the plaster is produced the addition of thu the hber and the set bet of the plaster planter is here determined by the use of a substance introduced into the plaster before it goes into the sacks this is a known as the and is a costly material it can only be secured in ohio and the car of purchased by the company cost nver nat r in ohio iid the railroads got over for hauling it here the se secret ret of correct plaster manufacture is in knowing how to 10 add the ben bell bickel has this under his immediate charge and he can mix tile the plaster so thit that it will vill set in ili a few minutes or in several hours with all the gradation between thee jhc thc e two points herein lieb the of at the jumbo plaster in addition to its purity it is mixed right the sacking of the plaster is an interesting sight but it is ia a strenuous occupation for the men engaged in it |