Such a glass structure and its relatively high viscosity in the formation region predetermine the absence of an orientation effect when it is drawn into fine fibers. As the constituents which fill the glass framework are re moved or their cementing effect is weakened, the fiber deformation increases sharply, and approaches, in its nature, the defor mation of substances which do have a chain structure Further study of the reaction of fine glass fibers to various agents, and a more thorough study of the struc ture of leached fibers will add to our ideas on the structure of glass THE POLISHING CAPACITY OF SOVIET-PRODUCED ROUGES A. I. Korelova and t. a. makarova Nine rouges from different glass factories were investigated by the cold-working laboratory of the USSR Academy of Sciences Institute of silicate Chemistry, with the aim of comparing the polishing capacity of Soviet-produced rouges. The rouges can be divided according to the method of manufacture, as follows: rouge produced by roast ing, i. e, the products formed through the reaction of green vitriol and soda ash(soda method), the reaction pro ducts of green vitriol and bottoms consisting of iron-bearing waste from chemical production, and also from roasted and unroasted pyrite cinder dust, The chemical composition of the polishing powders and their content of nonacid-soluble inclusions were determined by the conventional analytical chemistry procedures, The amount of quartz particles contained TABLE 1 Chem. comp. o SiO2 Type of rouge Producer factory 日 particle a no Pe,0, Pie cao Mgo999 53 sIze, u 区日 "Dzerzhinskii# 4,932,890,0 18:212 -0,440,23 Proletar 3113:31:1::8131 From pyrite cinder dust Gor'kii 61,636.37|1,18|0,35,0415.9800501015.6<05,471 rom pyrite cinder dust Troitsk 828器(82-1815351:岛 3:389:83esae815an5o 15y of the particles are 100-150pSuch a glass structure and its relatively high viscosity in the formation region predetermine the absence of an orientation effect when it is drawn into fine fibers. As the constituents which fill the glass framework are re￾moved or their cementing effect is weakened, the fiber deformation increases sharply, and approaches, in its nature, the deformation of substances which do have a chain structure. Further study of the reaction of fine glass fibers to various agents, and a more thorough study of the struc￾ture of leached fibers will add to our ideas on the structure of glass. THE POLISHING CAPACITY OF SOVIET-PRODUCED ROUGES A. I. Korelova and T. A. Makarova Nine rouges from different glass factories were investigated by the cold-working laboratory of the USSR Academy of Sciences Institute of Silicate Chemistry, with the aim of comparing the polishing capacity of Soviet-produced rouges. The rouges can be divided according to the method of manufacture, as follows: rouge produced by roast￾ing, i.e., the products formed through the reaction of green vitriol and soda ash (soda method), the reaction pro￾ducts of green vitriol and bottoms consisting of iron-bearing waste from chemical production, and also from roasted and unroasted pyrite cinder dust, The chemical composition of the polishing powders and their content of nonacid-soluble inclusions were determined by the conventional analytical chemistry procedures. The amount of quartz particles contained TABLE 1 Type of rouge Soda Vitriol Bottoms From pyrite cinder dust (roasted) From pyrite cinder dust (unroasted) Producer factory Chem. comp. % R~Os F%Oa gitli PesOa CaO MgO "Dzerzhinskii" 97,32 0,44 0.23 /'Avt~176 . . 97,78 0;2 -- ~aoos /'Proletarii" 94,93 2,89 0,04 0,09 1 "Avtosteklo" 91,37 0.m o.33 J"prolotarii" 96,54 1~-31 0.07 0,03 Gor'kii 61,63 6,37 1,18 0,33 l"Proletarii" 79,68 5,34 0,25 0,20 J Irbitsk 9 71,62 2,87 0,57 0,10 9 About 40~,~ 20 of SiO~Darticles are between 15 and 50g 9 * About of the ~phrticles are 50-300g 9 ** About 15% of the particles are 100-150g 9 Z-; ~8 0,15 0,73 1,17 4,02 1,10 5,04 1.41 2,91 2,0~ 100,17i 1,1~ 100,451 1,1~ 100.24] 5,0~ I01,011 I,I~ I00,17 t 5,98 1oo,53 / 3,27 100,15 / 2,42 100,49 / C~0 o = particIe size, ~ OD r00 0.1 <15" ~20 0,6 10-50"* ~2o 1,1 3--6 '00 2,6 10--20 100 1,1 <15 '20 5,6 <10 -- ~,5 425 3,6 <30" m o.~ 7,9 76 3,2 76 5,~ 63 5,1 74 5,8 60 5,4 71 4,7 67 1,8 59 612